nuclear

Iran Signals Possible “Fast Deal” To Be Made In Nuclear Talks As U.S. Military Build-Up Grinds On

Amid the steady drumbeat of reports pointing to the growing likelihood of strikes on Iran, there are indications that officials from Washington and Tehran will meet this week for another round of talks centered on the Iranian nuclear program. While the two sides remain generally at loggerheads, Iranian officials are now openly talking about possible concessions on their nuclear program in return for sanctions relief and the right to enrich uranium for peaceful purposes.

The Iranian foreign minister, Abbas Araghchi, told CBS over the weekend that U.S. and Iranian negotiators would likely hold more discussions in Geneva on Thursday, with the aim of making “a fast deal.” Iran and the United States resumed negotiations earlier this month.

Iran's Foreign Minister Abbas Araghchi (C) looks on prior to delivering a speech during a session of the United Nations Conference on Disarmament, on the sideline of a second round of US-Iranian talks with Washington pushing Tehran to make a deal to limit its nuclear programme, in Geneva, on February 17, 2026. (Photo by Valentin Flauraud / AFP via Getty Images)
Iranian Foreign Minister Abbas Araghchi (center) before delivering a speech during a session of the United Nations Conference on Disarmament, on the sidelines of a second round of U.S.-Iranian talks with Washington, in Geneva, on February 17, 2026. Photo by Valentin Flauraud / AFP

Now, Araghchi says that he thinks there is still a good chance of finding a diplomatic solution in planned talks with U.S. special envoy Steve Witkoff. However, he added that “If the United States attacks us, then we have every right to defend ourselves.” Iran has repeatedly threatened to strike U.S. bases in the region if it is attacked.

Aragachi raised the possibility of a new nuclear deal that would see Iran committing to keep its nuclear program “peaceful forever.” This would be a major advance over the previous, time-limited agreement, which was negotiated by the Obama administration in 2015, but from which U.S. President Donald Trump withdrew in 2018, during his first term in office.

Araghchi’s growing importance reflects the belief of U.S. officials that Iran’s supreme leader, Ali Khamenei, together with the country’s president, Masoud Pezeshkian, are increasingly being marginalized within the negotiations.

BREAKING: Iran’s Supreme Leader Ali Khamenei was the target of an internal effort to sideline him, allegedly led by former President Hassan Rouhani, just before the January 8–9 crackdown when protests were at their peak, Le Figaro reports.

— Faytuks Network (@FaytuksNetwork) February 22, 2026

Overall, the development comes as U.S. military assets continue to flow into the region as part of a massive deployment of forces.

Among the latest movements, it appears that additional U.S. Air Force KC-135 Stratotankers are being repositioned from the Indo-Pacific region and closer to the Middle East. These refueling assets would be vital to sustaining any kind of air campaign against Iran.

Other tankers and transports also continued to pour into the wider region after transatlantic flights over the weekend.

In terms of aircraft basing, the apparent postponement of planned runway reconstruction work at Diego Garcia in the Indian Ocean might point to one of the windows of opportunity for U.S. airstrikes. Work at the base, which could be important to any U.S. plans for a sustained campaign of airstrikes against Iran, has been pushed back successively from February to March, and now to April, according to notices to airmen (NOTAMs). As well as the long-range bombers that periodically operate out of Diego Garcia, the facility would need to host cargo and refueling support aircraft, as well as assets to defend the island from possible Iranian attack. As we reported last week, the United Kingdom has apparently said it would not allow the use of the island for strikes on Iran, although this position could certainly change. It is worth noting, too, that satellite imagery available to TWZ does not reveal any visible changes in terms of deployments to Diego Garcia.

Construction on Diego Garcia’s runway was initially expected to begin in February, then moved to March, and is now delayed again until April 2.

RWY 13/31 will close weekdays (0700–1700 local) for ~80 working days, according to the latest NOTAM pic.twitter.com/4q35SOfwHh

— Faytuks Network (@FaytuksNetwork) February 23, 2026

There are also reports, currently unconfirmed, from Israel’s Channel 12, of U.S. Air Force KC-135s at Ben Gurion Airport in Israel. Photos apparently show at least two of the tankers on the tarmac at the civilian airport, one of them wearing the markings of the 452nd Air Mobility Wing from March Air Reserve Base, California. The presence of U.S. KC-135s in Israel reflects the fact that Israel will likely be fully integrated into any upcoming operation against Iran, so putting tankers or even fighter aircraft there makes sense. Moreover, the United States has limited basing options in the region, including countries that have said they would not allow operations to run out of their airspace. Meanwhile, the threat of Iranian short-range missiles and drone strikes also limits where these U.S. assets can go.

לגבי מטוסי התדלוק האמריקאים בנתבג, לפחות אחד מהם (הקדמי – מס זנב 58-0052) הגיע לפה מקטאר

At least one of the two USAF kc135r photographed at Tel Aviv airport has arrived from Al-Udeid, Qatar

צילום לפי 27א pic.twitter.com/FlrMKNmR9O

— avi scharf (@avischarf) February 23, 2026

Elsewhere in Israel, Prime Minister Benjamin Netanyahu today delivered brief remarks in the Israeli parliament. He said Israel is facing “complex and challenging days,” but expressed confidence in the public. “We have pushed back an existential threat from the Iranian tyrant,” Netanyahu continued. “No one knows what tomorrow will bring. We are keeping our eyes open.”

Netanyahu delivers rare brief speech on Iran: ‘We are in complex days’

‘No one knows what tomorrow will bring,’ Netanyahu said in a rare brief Knesset speech a day after Cabinet talks, amid reports of US preparations for a strike …https://t.co/orF04TqzD7 pic.twitter.com/1CliDX4eVQ

— Ynet Global (@ynetnews) February 23, 2026

Meanwhile, the aircraft carrier USS Gerald R. Ford, its embarked airwing, and elements of its carrier strike group (CSG) are still in transit. Last Friday, TWZ reported on its transit into the western Mediterranean via the Strait of Gibraltar. As of today, the carrier was in Souda Bay, Crete, in the eastern Mediterranean. The Ford CSG will eventually be joining the Lincoln CSG, already deployed to the Middle East, as well as other Navy ships and scores of tactical jets, surveillance planes, tankers, airborne early warning and control aircraft, and additional air defense assets.

President Trump has consistently refused to rule out potential strikes against Iran, while stressing that no final decision has been made.

“The most I can say — I am considering it,” Trump said last Friday when asked if he was thinking about a “limited strike” against Iran. The president did not provide details of what that could entail or when it might be launched.

As to how “limited” a strike on Iran might be, the Washington-based Center for Strategic and International Studies (CSIS) think tank assesses that the assets currently deployed would not be sufficient for an extended, multi-week air campaign.

Good analysis. US build-up largest in 23 years, but smaller than 1991, 1998 or 2003. “there are not enough forces for an extended, multi-week air campaign. That would require a substantial logistical buildup, which…would take additional time.” https://t.co/tMsOVBxfw6 pic.twitter.com/nzJCpGYz9g

— Shashank Joshi (@shashj) February 23, 2026

Indicative of growing fears of a new conflict in the region, it was reported today that the U.S. Embassy in Beirut had evacuated “dozens” of non-essential personnel as “a precautionary measure due to anticipated regional developments.”

APNewsAlert: WASHINGTON (@AP) — State Department orders nonessential US diplomats and families to leave Lebanon as tensions with #Iran soar.

— Jon Gambrell | جون (@jongambrellAP) February 23, 2026

In contrast, in other public statements, Trump and administration officials have been pushing for a diplomatic resolution to the current Iranian crisis.

Speaking over the weekend, special envoy Witkoff said that the U.S. president was unsure why Iran had not yet yielded to U.S. pressure to curb its nuclear ambitions. “He’s curious as to why they haven’t … I don’t want to use the word ‘capitulated,’ but why they haven’t capitulated,” Witkoff told Fox News.

“Why, under this pressure, with the amount of sea power and naval power over there, why haven’t they come to us and said, ‘we profess we don’t want a weapon, so here’s what we’re prepared to do’?”

And there you have it: Witkoff says that Trump is frustrated/curious as to why Iran has not “capitulated” yet, despite massive US military threats.

This is the core of the matter: As I have written extensively, Israel and pro-Israeli voices have sold Trump a narrative that… pic.twitter.com/HkQlBJ6fqY

— Trita Parsi (@tparsi) February 22, 2026

Also this weekend, the New York Times published a report stating that Trump is eyeing a smaller initial set of strikes in order to pressure Iran to make a deal, prior to a much larger follow-on campaign if that pressure didn’t work. Our analysis sees that as being either unlikely to be true or a very poor decision if it is indeed in the works as reported.

The limited strike to pressure Iran to make a deal with the threat of more seems extremely problematic on so many levels. Messaging that now is a sign of weakness in the negotiations. Sorry, that’s the reality. I can’t believe military commanders would recommend this. https://t.co/1R5TwcRhOZ

— Tyler Rogoway (@Aviation_Intel) February 23, 2026

Breaking News: President Trump told advisers he would consider a larger attack on Iran if diplomacy or a targeted strike failed to deter its nuclear program. https://t.co/dsVODr28du

— The New York Times (@nytimes) February 22, 2026

However, the fact that more talks are being lined up suggests that the U.S. government is more confident that Iran will demonstrate that it’s not seeking to develop a nuclear weapon, including a commitment to diluting its stockpile of highly enriched uranium, which is critical to producing such a device.

Iran wants to retain the right to enrich uranium for peaceful purposes. This would involve a new verification process overseen by the International Atomic Energy Agency (IAEA), the United Nations nuclear inspectorate. As well as diluting its highly enriched uranium, the process would provide the IAEA with access to Iranian nuclear facilities, while sanctions placed on Tehran would be eased. The Iranian facilities would include the three nuclear sites that were targeted by U.S. strikes in June last year.

Last year, the IAEA estimated that Iran had stockpiled more than 970 pounds of uranium enriched to up to 60 percent fissile purity. A purity of 90 percent is considered weapons-grade.

Why Iran 2.0? Because the US was never going to have the intel after the Fordo strike to identify what happened to the 60% enriched uranium.  After 8 months, there has been plenty of time to clandestinely speed forward — as Iraq did after Israel’s Osirak attack in 1981. pic.twitter.com/xznZsywpbh

— Robert A. Pape (@ProfessorPape) February 21, 2026

According to Reuters, one option includes Tehran sending half of its most highly enriched uranium abroad, while the remainder is diluted, as well as establishing a regional enrichment consortium.

A senior Iranian official also told Reuters that Iran is willing to offer U.S. companies the opportunity to participate as contractors in its oil and gas industries.

With the possibility of a new nuclear deal, Republican lawmakers who have been pushing for a new military campaign against Iran are finding themselves being increasingly sidelined.

However, the Iranian government remains worried that, despite apparent progress being made on the nuclear issue, the Trump administration may still sanction an attack.

As well as U.S. pressure on its nuclear program, the Iranian regime is also facing serious problems closer to home, including a wave of protests, with violent clashes between demonstrators and the state-backed Basij militia. Most recently, violence has flared at universities in Tehran and the northeastern city of Mashhad.

Students chanted “Basij, Guards, you are our Daesh,” during a rally at Ferdowsi University in the northeastern city of Mashhad on Monday.pic.twitter.com/cDJ7Tbdzf2

— Iran International English (@IranIntl_En) February 23, 2026

Thousands of deaths have been reported in Iran since the protests began in December.

The full extent of the violence remains unclear, however, since the Iranian government has refused to permit a UN-led fact-finding team access to the country.

When the protests began, Trump made statements in support, telling the protesters that “help is on its way.” So far, however, a threatened military intervention has not materialized.

Now, Iran’s nuclear program is the subject of renewed focus, with talks likely later this week. Meanwhile, a significant U.S. military presence remains in the region, meaning that a large-scale attack on Iran is very much still an option.

For the time being, it looks like Iran’s offer of new concessions may be a last-ditch effort to keep diplomacy alive and avoid the prospect of a new military conflict.

Contact the author: thomas@thewarzone.com

Thomas is a defense writer and editor with over 20 years of experience covering military aerospace topics and conflicts. He’s written a number of books, edited many more, and has contributed to many of the world’s leading aviation publications. Before joining The War Zone in 2020, he was the editor of AirForces Monthly.




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Washington-Iran nuclear deal talks continue in Geneva Thursday

Feb. 22 (UPI) — A nuclear deal will be the subject of negotiations between Washington and Iran Thursday, officials say.

Steve Witkoff and Jared Kushner will meet with Abbas Araghchi, Iran’s foreign minister, in Geneva following receipt of the proposal, which is expected Tuesday.

“If Iran gives a draft proposal, the U.S. is ready to meet in Geneva in order to start detailed negotiations to see if we can get a nuclear deal,” officials said, per Axios.

President Donald Trump had previously suggested that failure to reach a deal would lead to “bad things.”

Araghchi is slated to finish that proposal by Monday, the outlet reported.

“So there is no need for any military buildup, and military buildup cannot help it and annot pressurize us,” Araghchi said, CBS News reported.

He added that “If the U.S. attacks us, then we have every right to defend ourselves. Our missiles cannot hit the American soil. So obviously we have to do something else. We have to hit, you know, the Americans’ base in the region.”

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Amid tensions, Ukraine’s Chernobyl site remains part of a war zone | Nuclear Energy

NewsFeed

Few places in Ukraine have been spared from the impact of the Ukraine war, including the radioactive exclusion zone around the Chernobyl nuclear plant. Al Jazeera’s Nils Adler has been seeing how the site of the world’s worst nuclear disaster has been affected by the war.

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Iran’s Araghchi meets IAEA chief in Geneva ahead of nuclear talks with US | Nuclear Energy News

Iran’s top diplomat says he hopes to ‘achieve a fair and equitable deal’ before high-stakes talks are held on Tuesday.

Iranian Foreign Minister Abbas Araghchi has arrived in Geneva for high-stakes second round of nuclear talks with the United States aimed at reducing tensions and avert a new military confrontation that Iran’s Supreme Leader Ayatollah Ali Khamenei has warned could turn into a regional conflict.

“I am in Geneva with real ideas to achieve a fair and equitable deal,” Araghchi wrote on X on Monday. “What is not on the table: submission before threats.”

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Iran and the US renewed negotiations earlier this month to tackle their ⁠decades-long dispute over Tehran’s nuclear programme as US deploys warships, including a second aircraft carrier, to the region as mediators work to prevent a war.

Araghchi met with Rafael Grossi, the head of the International Atomic Energy Agency (IAEA), on Monday, after saying his team nuclear experts for a “deep technical discussion”.

The United Nations nuclear watchdog has been calling for access to Iran’s main nuclear facilities that were bombed by the US and Israel during the 12-day war in June. Tehran has said there might be a risk of radiation, so an official protocol is required to carry out the unprecedented task of inspecting highly enriched uranium ostensibly buried under the rubble.

Speaking to state-run IRNA news agency on Monday, foreign ministry spokesman Esmail Baghaei said the IAEA will play “an important role” in upcoming mediated talks between Iran and the US. But he also renewed Tehran’s criticism of Grossi for the director’s refusal to condemn military strikes on Iranian nuclear sites that are protected under agency safeguards as part of the Non-Proliferation Treaty (NPT).

Araghchi also said he would meet his Omani counterpart, Badr bin Hamad al-Busaidi, who mediated the first round of talks between Iran and the US since the war earlier this month.

Iran has repeatedly emphasised that it will not agree to Washington’s demand for zero nuclear enrichment, and considers its missile programme a “red line” that cannot be negotiated.

Meanwhile, the US continues to build up its military presence in the region, with President Donald Trump saying a change of power in Iran “would be the best thing that could happen” and sending in a second aircraft carrier.

Trump is again likely to send his special envoy Steve Witkoff and his son-in-law Jared Kushner to represent the White House in the Geneva talks. Brad Cooper, the most senior US military commander in the region, had unexpectedly joined the US delegation during the Muscat talks on February 6.

The talks also come over a month after Iran’s deadly crackdown against nationwide protests, with Iranian officials claiming “terrorists” and “rioters” armed and funded by the US and Israel were behind the unrest.

The UN and international human rights organisations have blamed Iranian authorities for the widespread use of lethal force against peaceful protesters, which killed thousands, mainly on the nights of January 8 and 9.

But the hardliners in Tehran are more concerned about any potential concessions that could be given during upcoming talks with the US.

Addressing an open session on Monday, one of the most hardline lawmakers in Iran’s parliament cautioned security chief Ali Larijani against giving inspection access to the IAEA befire ensuring Iran’s territorial integrity, the security of nuclear sites and scientists, and use of peaceful nuclear energy for civilian purposes under the NPT.

“When US warships have opened their arms to embrace Iranian missiles, US bases have opened arms to take our missiles, and the homes of Zionist military personnel are anticipating the sound of the air raid sirens, it is obvious that such conditions cannot be met at the moment,” said Hamid Rasaei, a cleric close to the hardline Paydari (Steadfastness) faction.

In the other diplomatic track pursued in Switzerland on Tuesday, officials will be discussing ways of ending the Ukraine war, which is approaching the end of its fourth year after Russia’s full-scale invasion in 2022.

But no immediate breakthrough appears in sight, with Ukrainian President Volodymyr Zelenskyy telling the annual Munich Security Conference on Saturday that Kyiv has “too often” been asked to make concessions.

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Netanyahu calls for dismantling Iran’s nuclear programme in any US deal | Israel-Iran conflict News

Israeli Prime Minister Benjamin Netanyahu has outlined the conditions he considers necessary for any prospective deal between the United States and Iran, including the dismantling of all of Tehran’s nuclear infrastructure.

His comments on Sunday came as Iranian Minister of Foreign Affairs Abbas Araghchi headed to Switzerland for a second round of nuclear talks with the US.

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Speaking at the annual Conference of Presidents of Major American Jewish Organizations, Netanyahu said he was sceptical of a deal, but had told US President Donald Trump last week that any agreement must include several elements.

“The first is that all enriched material has to leave Iran,” he said.

“The second is that there should be no enrichment capability – not stopping the enrichment process, but dismantling the equipment and the infrastructure that allows you to enrich in the first place”.

The third, he said, was resolving the issue of ballistic missiles.

Netanyahu also called for sustained inspections of Tehran’s nuclear programme.

“There has to be real inspection, substantive inspections, no lead-time inspections, but effective inspections for all of the above,” he said.

Iran and the US resumed nuclear negotiations in Oman on February 6, months after previous talks collapsed when Israel launched an unprecedented bombing campaign against Iran last June, which started a 12-day war.

The US joined in the attacks, bombing three Iranian nuclear sites.

Netanyahu’s comments mark the first time he has spoken publicly on the discussions with Trump in Washington, DC, last Wednesday. The meeting was their seventh since Trump returned to office last year.

Trump told reporters afterwards that they had reached no “definitive” agreement on how to move forward with Iran, but that he had “insisted that negotiations with Iran continue to see whether or not a deal can be consummated”.

According to a report by Axios, the two leaders agreed to intensify economic strangleholds on Iran, mostly on its oil sales to China. More than 80 percent of Iranian oil exports current go to China.

The report, which cited US officials, said Netanyahu and Trump agreed in their meeting on the necessary end state: an Iran without the capability to obtain nuclear weapons. But they disagreed about how to get there.

Netanyahu told Trump it would be impossible to make a good deal, while Trump said he thought it was possible. “Let’s give it a shot”, Trump said, according to Axios.

Iran has long denied any intent to produce nuclear weapons, but has said it is prepared to discuss curbs on its atomic programme in exchange for the lifting of sanctions. It has ruled out linking the issue to missiles, however.

The CBS broadcaster, meanwhile, reported on Sunday that Trump had told Netanyahu during a meeting in Florida in December that he would support Israeli strikes on Iran’s ballistic missile programme if the US and Iran could not reach a deal.

The network cited two sources familiar with the matter.

There was no immediate comment from the US or Israel on the CBS report.

The renewed push for diplomacy comes after Trump threatened new attacks on Iran and sent a US aircraft carrier to the region, citing a deadly crackdown on antigovernment protesters in January.

Tensions in the region remain high, meanwhile.

On Friday, Trump said he was sending a second aircraft carrier to the Middle East, and openly discussed changing Iran’s government.

Asked if he wanted a government change in Iran, Trump responded that it “seems like that would be the best thing that could happen”.

Asked why a second aircraft carrier was headed to the Middle East, Trump said: “In case we don’t make a deal, we’ll need it … if we need it, we’ll have it ready.”

For its part, Iran has promised to retaliate to any attack, saying it will strike US bases in the Middle East.

The continued tensions have sparked fears of a wider regional war.

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C-17 Airlifts A Micro Nuclear Reactor For The First Time

Looking like a scene in a sci-fi movie, and in what is clearly a unique mission, dubbed Operation Windlord, USAF C-17s have been tasked with transporting a micro nuclear reactor. The U.S. military’s role is to transport the elements of the Ward250 reactor, made by Valar Atomics, from March Air Reserve Base in Southern California to Hill Air Force Base in Utah. Once on the ground in Utah, it will be moved to Utah San Rafael Energy Lab (USREL) in Orangeville for extensive testing. Beyond its direct utility, this operation may very well serve as a glimpse of what’s to come as the Department of Defense looks to integrate micro nuclear reactors into the power grids of critical installations.

A total of three C-17s will bring the components of the Ward250, eight modules in total, to Utah. This is said to be the first time a nuclear reactor has been moved via Globemaster III. The delivery of the Ward250 to USREL is part of the U.S. Department of Energy’s (DOE) Nuclear Reactor Pilot Program, established in response to President Donald Trump’s Executive Order 14301 last year.

Today, the Department of War will execute Operation Windlord, the first C-17 airlift of a nuclear reactor, in partnership with the Department of Energy and Valar Atomics.

Three C-17s Globemasters carrying the 8 modules of the Ward250 reactor will fly from March ARB to Hill AFB. pic.twitter.com/uIL7LMxACQ

— Isaiah Taylor – making nuclear reactors (@isaiah_p_taylor) February 15, 2026

DOE’s pilot program is looking to advance developments that could have commercial and military applications. The U.S. military has been pursuing its own micro-reactor efforts in recent years to help bring a resilient, safe, and scalable supply of electricity that is independent from local power grids to its bases. The vulnerability of America’s grid is palpable, and many military facilities are largely reliant on it. The use of micro reactors could also help remote installations that are dependent on their own power plants and future austere bases overseas that may have no direct access to a power grid at all.

You can read all about the Pentagon’s micro-reactor initiatives in our recent feature linked here.

Today, we’re exited to partner with the Department of War and Department of Energy on Operation Windlord. Three C-17s will be transporting our Ward250 reactor from March ARB to Hill AFB.

Here’s a peek at what it took to bring this operation to life. (Part 1) pic.twitter.com/aQR2l9aTd3

— Valar Atomics (@valaratomics) February 15, 2026

The commercial aspects of micro reactors are also what Valar Atomics, and the associated scalable nuclear energy concepts it is perusing, seeks to address under executive order 14301, which jumpstarts a ‘nuclear renaissance’ of sorts for U.S. energy, including powering commercial industries. This could be especially relevant for helping to quench what is becoming an insatiable thirst for electricity from data centers spurred on by the artificial intelligence (AI) boom.

Valar Atomics’ Ward250 is a next-generation reactor design that uses helium coolant and graphite moderators. At its core is so-called tri-structural isotropic (TRISO) fuel that consists of “uranium kernels encased in ceramic layers,” according to a previous press release from USREL.

Using TRISO nuclear fuels is often described as a way to produce higher performance than would be offered by comparable amounts of traditional fissile material used in power plants today. It is also said to be safer to use and handle. Past reports have said that Valar is aiming for Ward250 to be capable of reaching a 100-kWt (kilowatts of thermal energy) power rating.

The combination of TRISO fuel, helium-cooling, and graphite moderation “enable safer operations over past nuclear technologies and offer the ability to operate at higher temperatures than traditional plants,” according to USREL.

The Most Ambitious Energy Project on Earth – Valar Atomics




The Modular Citadel | Valar Atomics




Isaiah Taylor, the founder of Valar Atomics, also stated the following about the company’s vision and its very aggressive timelines:

“For four decades, the United States has underinvested in domestic energy production while exporting energy-intensive industries overseas. This strategic error has left us vulnerable precisely when energy demand is accelerating at unprecedented rates. Now, as we work to reshore critical manufacturing and compete in the energy-demanding field of artificial intelligence, we face power requirements that dwarf anything in our industrial history.

The scale of this challenge cannot be overstated. Training a single large language model can consume as much electricity as a small city. Advanced manufacturing requires constant, reliable power measured in gigawatts. The industrial processes needed to compete with China in critical materials and manufacturing are extraordinarily energy-intensive. Meanwhile, our existing grid infrastructure, much of it built decades ago, strains even under current demands.

Renewable sources cannot meet these baseload demands with the reliability and density required. While extremely valuable assets which also should be allowed to grow, natural gas and coal lack the speed and fundamental economics needed to counter China. Only nuclear power offers the combination of low cost, rapid timeline, and operational reliability necessary to power America’s technological and industrial renaissance.

For the first time in decades, nuclear energy is being treated as what it truly is: a strategic national asset essential to our prosperity, security, and global influence.

We are honored to announce that Valar Atomics has been selected by the U.S. Department of Energy to achieve criticality on American soil by July 4th, 2026.”

It appears that this airlift mission is crucial to realizing that goal.

We first got wind of the air transport mission when Taylor started posting from the flightline at March ARB yesterday. The images he posted show the sci-fi-looking reactor being rolled onto the C-17, along with other containers and support equipment.

The Pentagon has since posted about the operation:

A Pentagon release on Operation Windlord reads, in part:

“This groundbreaking collaboration with Valar Atomics is directly aligned with President Trump’s Executive Order to reshape and modernize America’s nuclear energy landscape.

On Sunday, February 15, 2026, a next-generation nuclear reactor will be transported via C-17 from March Air Reserve Base in California to Hill Air Force Base in Utah. The reactor will then be transported to Utah San Rafael Energy Lab (USREL) in Orangeville, Utah, for testing and evaluation.

The successful delivery and installation of this reactor will unlock significant possibilities for the future of energy resilience and strategic independence for our nation’s defense, showcasing an agile, innovative, and commercial-first approach to solving critical infrastructure challenges. By harnessing the power of advanced nuclear technology, we are not only enhancing our national security but championing a future of American energy dominance.”

As to why the reactor was not transported to Utah on the ground, that is not clear. Security is a glaring issue with anything nuclear, so that was likely a factor. Then there is the Pentagon’s push for nuclear reactors, which could see movements like this become commonplace. As an aside, the USAF unit involved in the transport, the 62nd Airlift Wing, is the only one currently known to be certified to ferry routine nuclear weapons shipments. As a result, the 62nd is often involved in the movement of other kinds of nuclear material in cooperation with DOE.

Radioisotope thermoelectric generators, headed for disposal at the Nevada National Security Site, seen loaded on a C-17 in 2015. USAF

On top of being part of an important effort to advance new nuclear power technologies, Operation Windlord would be a great proof of concept that will inform future micro reactor airlift operations.

Contact the author: Tyler@twz.com

Tyler’s passion is the study of military technology, strategy, and foreign policy and he has fostered a dominant voice on those topics in the defense media space. He was the creator of the hugely popular defense site Foxtrot Alpha before developing The War Zone.




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Iran’s Araghchi slams European powers for ‘irrelevance’ in nuclear talks | Nuclear Weapons News

Foreign minister says regional powers have been ‘far more effective’ than European countries.

Iranian Foreign Minister Abbas Araghchi has derided the Munich Security Conference as a “circus”, accusing European powers of “paralysis and irrelevance” in efforts to revive nuclear negotiations with the United States.

Iranian officials were not invited to the annual security meeting in the German city.

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“Sad to see the usually serious Munich Security Conference turned into the ‘Munich Circus’ when it comes to Iran,” Araghchi wrote on X on Sunday.

“The paralysis and irrelevance of the EU/E3 is displayed in the dynamics surrounding the current talks over Iran’s nuclear program. … Once a key interlocutor, Europe is now nowhere to be seen. Instead, our friends in the region [the Gulf] are far more effective and helpful than an empty-handed and peripheral E3.”

The E3 – which included France, the United Kingdom and Germany – were key players in the previous round of nuclear negotiations between world powers and Iran. That process culminated in 2015 with the Joint Comprehensive Plan of Action, a landmark agreement aimed at limiting the scope of Iran’s nuclear programme in exchange for sanctions relief.

The US under the first administration of President Donald Trump withdrew from the deal in 2018 and ramped up sanctions on Iran. Since then, the process has largely stalled. Still, the E3 maintained a role as a go-between with Tehran and Washington.

But since negotiations resumed last year, Gulf countries, such as Oman and Qatar, have taken the lead in facilitating talks between the US and Iran.

Araghchi made the remarks before leaving Tehran to lead a diplomatic and technical delegation to Geneva for a new round of nuclear talks with the US. The talks follow last week’s indirect negotiations in Oman, which is mediating the process, Iran’s Foreign Ministry said in a statement.

During his visit, Araghchi is expected to meet his Swiss and Omani counterparts, as well as the head of the International Atomic Energy Agency, Rafael Grossi, and other international officials.

Abas Aslani, a senior research fellow at the Center for Middle East Strategic Studies, said Araghchi’s comments “indicate a policy shift from the Iranian side that the E3 mechanism … is no longer a valid channel for resolution”.

“This nuclear mediation has moved from Europe to the region, and now the heavy lifting in diplomacy is done by regional players,” he said.

On Tuesday, Oman is to host talks between the US and Iran in Geneva after previous indirect negotiations in Muscat on February 6. Those talks were attended by US envoy Steve Witkoff and Trump’s son-in-law and adviser Jared Kushner.

US and Iranian officials previously held several rounds of talks in the Omani capital to discuss Iran’s nuclear programme last year. But that process was halted as Israel launched a 12-day war with Iran in June, which the US briefly joined by bombing three Iranian nuclear facilities.

The new rounds of negotiations come as tensions in the region remain high, with Trump moving more US military assets to the Middle East. On Friday, the US president said he was sending a second aircraft carrier to the region while openly talking about a change in Iran’s government.

Despite the new push for diplomacy, the two sides have maintained their positions. Iran has shown flexibility in discussing its nuclear programme, but the US wants to widen the talks to include Iran’s ballistic missiles and its support for regional armed groups – two issues that Tehran says are nonnegotiable.

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Trump sends USS Gerald R. Ford to Middle East amid Iran nuclear talks

Feb. 13 (UPI) — The U.S. military is sending the USS Gerald R. Ford, the world’s largest aircraft carrier, to the Middle East as tensions with Tehran over its nuclear program ratchet up, President Donald Trump confirmed Friday.

Trump told reporters he’s sending the vessel because if the United States and Iran doesn’t “make a deal, we’ll need it,” The Hill reported.

The vessel and its supporting warships, which are in the Caribbean, will join the USS Abraham Lincoln in a trek that’s expected to take about three to four weeks, The Guardian reported.

“We have an armada that is heading there and another one might be going,” Trump said in an interview with Axios on Tuesday.

An unnamed official said Trump made the decision to send the USS Gerald R. Ford to the Middle East after his Thursday meeting with Israeli Prime Minister Benjamin Netanyahu.

The U.S. Southern Command said in a statement to The Hill that it was carrying out “mission-focused operations to counter illicit activities and malign actors in the Western Hemisphere.”

“While force posture evolves, our operational capability does not. SOUTHCOM forces remain fully ready to project power, defend themselves, and protect U.S. interests in the region.”

U.S. and Iranian leaders have been involved in negotiations over Iran’s nuclear arms program. Tehran has shown willingness to scale back its nuclear program in exchange for a lifting of economic sanctions, but has declined to consider requests to scale back its ballistic missile arsenal.

President Donald Trump speaks alongside Administrator of the Environmental Protection Agency Lee Zeldin in the Roosevelt Room of the White House on Thursday. The Trump administration has announced the finalization of rules that revoke the EPA’s ability to regulate climate pollution by ending the endangerment finding that determined six greenhouse gases could be categorized as dangerous to human health. Photo by Will Oliver/UPI | License Photo

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Russia says it will stick to limits of expired nuclear treaty if US does | Nuclear Weapons News

Foreign Minister Sergey Lavrov did not say why he believed the US would respect the limits set out in New START.

Russia has said it will abide by limits on its nuclear weapons as set out in a lapsed arms control treaty with the United States, as long as Washington continues to do the same.

The New START agreement expired earlier this month, leaving the world’s two biggest nuclear-armed powers with no binding constraints on their strategic arsenals for the first time in more than half a century and sparking fears of a new global arms race.

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In an address to parliament on Wednesday, Russian Foreign Minister Sergey Lavrov said that Moscow was in no rush to start developing and deploying more weapons – backtracking on comments made by his ministry last week that said Russia considered itself no longer bound by the treaty’s terms.

“We proceed from the fact that this moratorium, which was announced by our president, remains in effect, but only while the United States does not exceed the outlined limits,” said Lavrov.

“We have reason to believe that the United States is in no hurry to abandon these limits and that they will be observed for the foreseeable future,” he said, without explaining the basis for that assumption.

US President Donald Trump rejected an offer from Russian President Vladimir Putin to voluntarily abide by the limits set out in New START for another year, saying he wanted a “new, improved and modernised” treaty rather than an extension of the old one.

Russia has also indicated it wants to strike a new arms control agreement.

Washington is pushing for China to be included in the talks, pointing to its growing nuclear arsenal.

According to the Stockholm International Peace Research Institute (SIPRI), China’s nuclear arsenal is growing faster than that of any other country by about 100 new warheads a year since 2023.

However, Beijing refuses to negotiate with the US and Russia because it says it has only a fraction of their warhead numbers – an estimated 600, compared with about 4,000 each for Russia and the US.

As the treaty expired, Chinese Foreign Ministry spokesperson Lin Jian said that China would not be joining the bilateral arms-reduction talks.

Moscow says if China is brought into a new deal, then so too should the US’s nuclear allies, the United Kingdom and France, which have 290 and 225 warheads, respectively.

New START, first signed in Prague in 2010 by the then-presidents of the US and Russia, Barack Obama and Dmitry Medvedev, limited each side’s nuclear arsenal to 1,550 deployed strategic warheads – a reduction of nearly 30 percent from the previous limit set in 2002.

Deployed weapons or warheads are those in active service and available for rapid use as opposed to those in storage or awaiting dismantlement.

It also allowed each side to conduct on-site inspections of the other’s nuclear arsenal, although these were suspended during the COVID-19 pandemic and have not resumed since.

Russia in 2023 rejected inspections of its nuclear sites under the treaty, as tensions rose with the US over its nearly four-year war in Ukraine.

But it said it had remained committed to the quantitative limits set down.

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Iran suggests it could dilute highly enriched uranium for sanctions relief | Nuclear Energy News

Iran’s atomic energy chief says Tehran is open to diluting its highly enriched uranium if the United States ends sanctions, signalling flexibility on a key demand by the US.

Mohammad Eslami made the comments to reporters on Monday, saying the prospects of Iran diluting its 60-percent-enriched uranium, a threshold close to weapons grade, would hinge on “whether all sanctions would be lifted in return”, according to Iran’s state-run IRNA news agency.

Eslami did not specify whether Iran expected the removal of all sanctions or specifically those imposed by the US.

Diluting uranium means mixing it with blend material to reduce its enrichment level. According to the United Nations nuclear watchdog, Iran is the only state without nuclear weapons enriching uranium to 60 percent.

US President Donald Trump has repeatedly called for Iran to be subject to a total ban on enrichment, a condition unacceptable to Tehran and far less favourable than a now-defunct nuclear agreement reached with world powers in 2015.

Iran maintains it has a right to a civilian nuclear programme under the provisions of the nuclear Non-Proliferation Treaty, to which it and 190 other countries are signatories.

Eslami made his comments on uranium enrichment as the head of Iran’s Supreme National Security Council, Ali Larijani, prepares to head on Tuesday to Oman, which has been hosting mediated negotiations between the US and Iran.

Al Jazeera’s Ali Hashem, reporting from Tehran, said Larijani, one of the most senior officials in Iran’s government, is likely to convey messages related to the ongoing talks.

Trump said talks with Iran would continue this week.

Negotiations ‘very serious’

Both the US and Iran have given mixed signals about their progress in the negotiations. Iranian Foreign Minister Abbas Araghchi said Iran is “very serious in negotiations” and is eager to “achieve results”. However, he said, “There is a wall of mistrust towards the United States, which stems from America’s own behaviour.”

Iranian President Masoud Pezeshkian said the ongoing negotiations are an “important opportunity to reach a fair and balanced solution”, IRNA reported. He stressed that “Iran seeks guarantees for its nuclear rights” and the lifting of “unjust sanctions”, the agency added.

Trump, for his part, praised the latest round of talks on Friday as “very good” but continued to warn of “steep consequences” for Iran if it does not strike a deal.

“They want to make a deal as they should want to make a deal,” the US president said. “They know the consequences if they don’t.”

Before the two sides agreed to talks, Trump had repeatedly threatened Iran with a “far worse” attack than the US strikes on three Iranian nuclear facilities during June’s 12-day Israel-Iran war. He has escalated the pressure by deploying an aircraft carrier and accompanying warships to the Middle East.

Trump is expected on Wednesday to meet with visiting Israeli Prime Minister Benjamin Netanyahu, who is pushing the US to take a hardline stance in its negotiations with Iran, demanding not just concessions on its nuclear programme but also on its ballistic missiles and regional alliances.

Andreas Krieg, an associate professor in security studies at King’s College London, said the US and Iran appear to be “pivoting closer to a deal” than they were several weeks ago, even though there’s still a high risk of conflict.

“The [US] ‘armada’, as Trump calls it, is still in the area, so we still have that coercion going against the [Iranian] regime by the Americans,” Krieg told Al Jazeera. “But it seems to be fruitful in the way that the pressure works, and the Iranians have to make concessions.”

He added: “All the messaging from the Gulf countries – from Qatar, from Oman – from everyone involved, including from the Americans, has been very positive. And the Iranians’ feedback themselves was very positive.

“I think the problem that we have right now is how do we translate this momentum that we have right now on a strategic framework into the nitty-gritty of the details.”

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Iran FM says Tehran ready for deal with US with peaceful nuclear enrichment | Nuclear Energy

NewsFeed

In an exclusive interview with Al Jazeera Arabic, Iranian Foreign Minister Abbas Araghchi says Tehran is ready to reach a deal with the US that allows for peaceful nuclear enrichment, following talks in Oman. He rejects the notion that Washington should be able to dictate what range missiles Iran produces.

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No evidence to support US claim China conducted nuclear blast test: Monitor | Nuclear Weapons News

Washington wants Beijing to join a new nuclear weapons treaty after expiration of the New START accord between the US and Russia.

An international monitor said it has seen no evidence to support the claim by a senior United States official who accused China of carrying out a series of clandestine nuclear tests in 2020 and concealing activities that violated nuclear test ban treaties.

US Under Secretary of State for Arms Control and International Security Thomas DiNanno made the assertions about China at a United Nations disarmament conference in Geneva, Switzerland, on Friday, just days after a nuclear treaty with Russia expired.

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“I can reveal that the US government is aware that China has conducted nuclear explosive tests, including preparing for tests with designated yields in the hundreds of tonnes,” DiNanno said at the conference.

China’s military “sought to conceal testing by obfuscating the nuclear explosions because it recognised these tests violate test ban commitments,” he said.

“China conducted one such yield-producing nuclear test on June 22 of 2020,” he said.

DiNanno also made his allegations on social media in a series of posts, making the case for “new architecture” in nuclear weapons control agreements following the expiration of the New START treaty with Russia this week.

“New START was signed in 2010 and its limits on warheads and launchers are no longer relevant in 2026 when one nuclear power is expanding its arsenal at a scale and pace not seen in over half a century and another continues to maintain and develop a vast range of nuclear systems unconstrained by New START’s terms,” he said.

Robert Floyd, executive secretary of the Comprehensive Nuclear-Test-Ban Treaty Organization, said in a statement on Friday that the body’s monitoring system “did not detect any event consistent with the characteristics of a nuclear weapon test explosion” at the time of the alleged Chinese test, adding that that assessment remains unchanged after further detailed analyses.

China’s ambassador on nuclear disarmament, Shen Jian, did not directly address DiNanno’s charge at the conference but said Beijing had always acted prudently and responsibly on nuclear issues while the US had “continued to distort and smear China’s national defence capabilities in its statements”.

“We firmly oppose this false narrative and reject the US’s unfounded accusations,” Shen said.

“In fact, the US’s series of negative actions in the field of nuclear arms control are the biggest source of risk to international security,” he said.

Later on social media, Shen said, “China has always honored its commitment to the moratorium on nuclear testing”.

Diplomats at the conference said the US allegations were new and concerning.

China, like the US, has signed but not ratified the Comprehensive Nuclear Test Ban Treaty (CTBT), which bans explosive nuclear tests. Russia signed and ratified it, but withdrew its ratification in ⁠2023.

US President Donald Trump has previously instructed the US military to prepare for the resumption of nuclear tests, stating that other countries are conducting them without offering details.

The US president said on October 31 that Washington would start testing nuclear weapons “on an equal basis” with Moscow and Beijing, but without elaborating or explaining what kind of nuclear testing he wanted to resume.

He has also said that he would like China to be involved in any future nuclear treaty, but authorities in Beijing have shown little interest in his proposal.

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China Secretly Testing Nuclear Weapons And Covering Its Tracks, U.S. Alleges (Updated)

The U.S. government has accused China of secretly conducting at least one “yield-producing nuclear test” in recent years despite the country having a stated moratorium on such activities. Last year, U.S. President Donald Trump announced plans to engage in new nuclear testing “on an equal basis” with China and Russia, but it remains unclear what that might mean and what action has been taken. The new test allegation also comes as American officials continue to call for a new nuclear arms control treaty that includes China to succeed the New START agreement with Russia, which sunset yesterday.

“Today, I can reveal that the U.S. government is aware that China has conducted nuclear explosive tests, including preparing for tests with designated yields in the hundreds of tons,” Thomas DiNanno, Under Secretary of State for Arms Control and International Security, said during a speech at the Conference on Disarmament in Geneva, Switzerland this morning. “The PLA [China’s People’s Liberation Army] sought to conceal testing by obfuscating the nuclear explosions because it recognized these tests violate test ban commitments.”

Then Deputy Assistant Secretary of State Thomas DiNanno seen descending into a Minuteman III intercontinental ballistic missile (ICBM) launch facility at Minot Air Force Base in North Dakota during an inspection in 2019. US State Department

China is a signatory to the Comprehensive Nuclear-Test-Ban Treaty (CTBT), but has never ratified it. The same is true of the United States. Both countries have stated self-imposed moratoriums on yield-producing nuclear testing. The CTBT does not prohibit sub-critical testing, which does not involve a full-fledged nuclear reaction. China’s last acknowledged critical-level nuclear test was in 1996. The last U.S. test of that kind was in 1992.

“China has used decoupling – a method to decrease the effectiveness of seismic monitoring – to hide its activities from the world,” DiNanno added. “China conducted one such yield-producing nuclear test on June 22nd of 2020.”

China has conducted nuclear explosive tests, including preparing for tests with designated yields in the hundreds of tons… China has used decoupling – a method to decrease the effectiveness of seismic monitoring – to hide its activities from the world. China conducted one such…

— Under Secretary of State Thomas G. DiNanno (@UnderSecT) February 6, 2026

The CTBT’s primary verification method is a global network of hundreds of seismic monitoring stations.

As an aside, the last official nuclear test in Russia came in 1990, just before the fall of the Soviet Union. The United Kingdom, France, India, and Pakistan also conducted yield-producing nuclear tests at various points in the 1990s. North Korea is the only country known to have conducted such tests since 2000, with the detonation of five devices in separate instances between 2006 and 2017.

The video below offers an excellent graphical representation of the extent of known nuclear testing, covering detonations between 1945 and 1998.

A Time-Lapse Map of Every Nuclear Explosion Since 1945 – by Isao Hashimoto




At the time of writing, the U.S. government does not appear to have provided further details about the newly alleged Chinese nuclear testing. When American officials arrived at their current assessments about these activities is also unclear.

The U.S. State Department made no mention of any such testing in China in its most recent routine international arms control compliance report, published in April 2025. That report did reiterate previous U.S. accusations that Russia has engaged in supercritical nuclear testing in violation of its commitments to multiple test ban treaties, something DiNanno also highlighted in his speech today. Russia is a signatory to the CTBT and had previously ratified it. Russian President Vladimir Putin revoked that ratification in 2023 after the country’s parliament, or Duma, passed a law approving that action.

The Pentagon’s annual report to Congress on Chinese military developments, published in December 2025, also makes no mention of Chinese nuclear testing.

President Trump may have alluded to this allegation in an interview with CBS News‘ “60 Minutes” last November.

“They [China and Russia] don’t go and tell you about it,” Trump said. “You know, as powerful as they are, this is a big world. You don’t necessarily know where they’re testing. They — they test way under — underground where people don’t know exactly what’s happening with the test.”

“You feel a little bit of a vibration. They test and we don’t test,” Trump continued. “But Russia tests, China — and China does test, and we’re gonna test also.”

In an earlier compliance report, the State Department had raised concerns about work China was observed doing at its Lop Nur nuclear test site in 2019. That report was notably published in June 2020, the same month Under Secretary DiNanno says the PLA conducted the yield-producing test.

“China’s possible preparation to operate its Lop Nur test site year-round, its use of explosive containment chambers, extensive excavation activities at Lop Nur, and lack of transparency on its nuclear testing activities – which has included frequently blocking the flow of data from its International Monitoring System (IMS) stations to the International Data Center operated by the Preparatory Commission for the Comprehensive Nuclear Test-Ban Treaty Organization – raise concerns regarding its adherence to the ‘zero yield’ standard adhered to by the United States, the United Kingdom, and France in their respective nuclear weapons testing moratoria,” the report explained.

Following Trump’s interview in November 2025, Chinese authorities had pushed back and reiterated the country’s stated commitment to its moratorium on nuclear testing.

“China notes that the U.S. continues in its statement to hype up the so-called China nuclear threat. China firmly opposes such false narratives,” Chinese Ambassador Shen Jian, Deputy Permanent Representative of the People’s Republic of China to the United Nations Office at Geneva and other International Organizations in Switzerland, said today following Under Secretary DiNanno’s remarks, according to Reuters. “It (the United States) is the culprit for the aggravation of the arms race.”

For years now, China has been engaged in a massive expansion of its nuclear arsenal, both in terms of warheads and delivery systems, something that was showcased at a military parade in Beijing last September. This has included the construction of huge new fields of silos for intercontinental ballistic missiles and work on a system that involves launching a nuclear-capable hypersonic glide vehicle into orbit, among other new capabilities. The U.S. government has assessed that the Chinese have around 600 warheads in their stockpile at present, but that this number is on track to grow to 1,000 by 2030 and to 1,500 by 2035.

It should also be pointed out that the United States and Russia are both generally assessed to have roughly 4,000 warheads each. The U.S. figure has been declining in recent years, while the Russian one has been growing, according to the Federation of American Scientists (FAS) think tank in Washington, D.C.

As noted, successive U.S. administrations have been pushing for a new nuclear arms control regime that includes China. Negotiations in the past have focused more heavily on bilateral agreements with Russia, and the Soviet Union before it. The most recent of these deals, New START, expired as scheduled yesterday, following the conclusion of a one-time five-year extension. There are still unconfirmed reports that the U.S. and Russia may be working on an interim and non-legally-binding arrangement to keep the New START limits at least for some amount of time, as you can read more about here.

“New START was signed in 2010 and its limits on warheads and launchers are no longer relevant in 2026, when one nuclear power is expanding its arsenal at a scale and pace not seen in over half a century and another continues to maintain and develop a vast range of nuclear systems unconstrained by New START’s terms,” Under Secretary DiNanno also said in remarks today. “[China’s] buildup is opaque and unconstrained by any arms control limitations.”

“Rather than extend ‘NEW START’ (A badly negotiated deal by the United States that, aside from everything else, is being grossly violated), we should have our Nuclear Experts work on a new, improved, and modernized Treaty that can last long into the future,” President Trump had written yesterday on his Truth Social platform.

Trump:

Rather than extend “NEW START” (A badly negotiated deal by the United States that, aside from everything else, is being grossly violated), we should have our Nuclear Experts work on a new, improved, and modernized Treaty that can last long into the future. pic.twitter.com/MPlDNeTWLZ

— Clash Report (@clashreport) February 5, 2026

“The President’s been clear in the past that in order to have true arms control in the 21st century, it’s impossible to do something that doesn’t include China because of their vast and rapidly growing stockpile,” U.S. Secretary of State and acting National Security Advisor Marco Rubio also said during a press conference on Wednesday in response to a question about New START.

SECRETARY RUBIO: The President has been clear that in order to have true arms control in the 21st century, it’s impossible to do something that doesn’t include China — because of their vast & rapidly growing stockpile. pic.twitter.com/FiYVUsBAVb

— Dylan Johnson (@ASDylanJohnson) February 5, 2026

Chinese officials have repeatedly rebuffed calls to join negotiations on a new nuclear arms control agreement.

The allegations Under Secretary DiNanno raised today prompt new questions about the future of U.S. nuclear testing, as well. As mentioned, there has been little elaboration on exactly what President Trump meant by his announcement last year about future testing “on an equal basis” with Russia and China. At that time, U.S. Secretary of Energy Chris Wright had downplayed the possibility of a resumption of American yield-producing nuclear tests.

“Since the President’s statement, we have received many questions about what he meant,” DiNanno said during his speech in Geneva today, before diving into the accusations about Chinese and Russian tests. However, the Under Secretary did not explicitly say whether or not this meant the United States intends to conduct its own testing at this level going forward. He did say later on in his remarks that the U.S. government is committed to efforts to “restore responsible behavior when it comes to nuclear testing.”

You can read more about what it would actually take for the U.S. government to resume full-scale nuclear testing in this previous TWZ feature.

The end of New START has already been fueling renewed concerns about a new nuclear arms race, and one that would not necessarily be limited to the United States, Russia, and China.

Following today’s revelations in Geneva, more details at least about the new U.S. allegations about Chinese nuclear testing activities may begin to emerge.

Update: 1:50 PM EST –

In light of today’s remarks from Under Secretary DiNanno, the Comprehensive Nuclear-Test-Ban Treaty Organization’s (CTBTO) Executive Secretary Robert Floyd has issued a statement.

”The CTBTO’s International Monitoring System (IMS) is capable of detecting nuclear test explosions with a yield equivalent to or greater than approximately 500 tonnes of TNT, including detecting all six tests conducted and declared by the DPRK [North Korea]. Below 500 tonnes is roughly 3 percent of the yield of the explosion that devastated Hiroshima,” Floyd says. “Mechanisms which could address smaller explosions are provided by the Treaty but can only be used once the Comprehensive Nuclear-Test-Ban Treaty enters into force. That is why it is important that the nuclear arms control framework includes the entry into force of the CTBT.  The need is more urgent now than ever.”

“Regarding reports of possible nuclear tests with yields in the hundreds of tonnes, on 22 June 2020, the CTBTO’s IMS did not detect any event consistent with the characteristics of a nuclear weapon test explosion at that time. Subsequent, more detailed analyses have not altered that determination,” he adds. “Any nuclear test explosion, by any state, is of deepest concern.”

Contact the author: joe@twz.com

Joseph has been a member of The War Zone team since early 2017. Prior to that, he was an Associate Editor at War Is Boring, and his byline has appeared in other publications, including Small Arms Review, Small Arms Defense Journal, Reuters, We Are the Mighty, and Task & Purpose.




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What The Sunset Of Key U.S.-Russia Nuclear Deal Could Mean For America’s Stockpile

A key nuclear arms control treaty between the United States and Russia has expired today, creating the potential for significant changes in U.S. force posture. This could include loading more warheads into Minuteman III intercontinental ballistic missiles (ICBM), restoring nuclear weapons capability to dozens of B-52 bombers, sending Ohio class ballistic missile submarines on patrol with extra Trident II submarine-launched ballistic missiles (SLBM), or fielding all-new capabilities. There are reports that American and Russian officials are negotiating a voluntary commitment to leave the two countries’ nuclear arsenals as they are, but this would be a temporary measure that could still leave open the door to a new arms race if a more permanent agreement cannot be reached.

U.S. and Russian Presidents Barack Obama and Dmitry Medvedev signed the New START Treaty in 2010, and it entered into force the following year. The terms of the deal included a provision for a one-time five-year extension, which U.S. and Russian Presidents Joe Biden and Vladimir Putin agreed to in 2021. Russia formally suspended its participation in the treaty in 2023, citing U.S. actions in relation to the war in Ukraine, but said it would voluntarily continue to abide by the imposed limits. The agreement now sunsets for good today. Years of U.S.-Russian negotiations have so far failed to produce a follow-on treaty.

U.S. President Barack Obama, at left, and Russian President Dmitry Medvedev, at right, shake hands after signing the New START treaty in 2010. Government of Russia

New START limited each country to 700 deployed strategic missiles and bombers (700), 1,550 total strategic nuclear warheads, and 800 relevant deployed and non-deployed launchers. For purposes of the treaty, strategic missiles were defined as ICBMs and SLBMs. Each reentry vehicle inside a single ICBM or SLBM, as well as each nuclear-capable heavy bomber, counted as a single warhead. Bombers, along with silos and mobile transporter-erector launchers for IBCMs and SLBM launch tubes on submarines, were all treated as individual launchers.

Axios has reported that U.S. and Russian negotiators in Abu Dhabi in the United Arab Emirates have been working to finalize a non-legally-binding voluntary commitment to stick to the New START limits at least for another six months. Delegations from the United States and Russia were already in the Middle Eastern country for talks regarding the ongoing conflict in Ukraine. Those meetings have separately produced an agreement to re-establish a high-level U.S.-Russian military-to-military dialogue for the first time since 2021.

The Kremlin had released a statement yesterday that, in part, reiterated a call Putin first made last September for both parties “to commit to voluntary self-limitations to keep the quantitative ceilings on the relevant weapons specified in the Treaty for at least one year after the termination of the agreement.” It’s not clear how this would be verified without the inspection provisions that were central to New START.

“Rather than extend ‘NEW START’ (A badly negotiated deal by the United States that, aside from everything else, is being grossly violated), we should have our Nuclear Experts work on a new, improved, and modernized Treaty that can last long into the future,” President Trump wrote today on his Truth Social platform. However, he did not explicitly rule out the possibility of a temporary voluntary arrangement in the interim.

Trump:

Rather than extend “NEW START” (A badly negotiated deal by the United States that, aside from everything else, is being grossly violated), we should have our Nuclear Experts work on a new, improved, and modernized Treaty that can last long into the future. pic.twitter.com/MPlDNeTWLZ

— Clash Report (@clashreport) February 5, 2026

“Not to my knowledge,” White House Press Secretary Karoline Leavitt said at a routine press conference today when asked about whether a temporary agreement to continue abiding by the New START limits had been reached.

“Not to my knowledge,” @PressSec Karoline Leavitt says when asked if there’s a temporary agreement with Russia to stand by the terms of the New START Treaty while negotiations are happening. pic.twitter.com/fOG5rWCsQK

— Jennifer Jacobs (@JenniferJJacobs) February 5, 2026

Regardless, in the absence of a formally binding agreement, the U.S. government does now technically have a free hand to make major changes to the state of America’s nuclear force posture for the first time in decades. There has been talk for years already about potential near-term steps the U.S. military might take if a more permanent deal did not emerge to follow New START’s sunset.

“A one-year extension would not prejudice any of the vital steps that the United States is taking to respond to the China nuclear build-up,” Rose Gottemoeller, a long-time American diplomat who served as the lead negotiator for New START, told members of the Senate Armed Services Committee just this week. “The period will buy extra time for preparation without the added challenge of a Russian Federation, newly released from New START limitations, embarking on a rapid upload campaign. This would not be in the U.S. interest.”

Loading more warheads into LGM-30G Minuteman III ICBMs could be one option. Each of those ICBMs is currently tipped with a single warhead in line with the New START limits. However, the missiles were originally designed for a multiple independently targetable reentry vehicle (MIRV) configuration with three warheads. Even with New START in force, Minuteman IIIs have still sometimes been fired as part of routine testing with multiple unarmed reentry vehicles, demonstrating that this remains an available capability.

Minuteman III Test Launch 4 Aug 2020 Vandenberg AFB, CA




“I do believe that we need to take serious consideration in seeing what uploading and re-MIRVing the ICBM looks like, and what does it take to potentially do that,” now-retired U.S. Air Force Gen. Anthony Cotton, then head of U.S. Strategic Command (STRATCOM), told members of the Senate Armed Services Committee back in 2024.

There are questions about how long it might take to ‘upload’ more warheads onto any portion of the 400 Minuteman IIIs currently sitting in silos spread across five states, and what that would cost. At least a portion of the deployed LGM-30Gs would also need to be refitted with MIRV-capable payload buses.

Right, of course. I didn’t know about the PBVs. Good to know, thanks.

— William Alberque (@walberque) February 4, 2026

The number of warheads inside deployed Trident IIs, which also have a MIRV configuration, could also change in the future. These SLBMs can carry up to 14 individual warheads, depending on their exact type, but are understood to have often not had maximum loads to keep in line with New START’s provisions.

Under the terms of the treaty, the U.S. Navy also sealed off four of the 24 tubes on each of its 10 Ohio class ballistic missile submarines. In the past, Russian officials had complained about the extent (or lack thereof) of those modifications, which also involved the removal of certain internal components, and raised concerns about being able to regularly verify that the changes had not been reversed. Still, it is unclear exactly how much effort might be required to reactivate those tubes in the future.

A picture showing open, unmodified launch tubes on an Ohio class ballistic missile submarine. USN

There is also the matter of restoring nuclear capability to dozens of B-52 bombers that were modified to only be capable of employing conventional weapons as part of New START. Russia also previously raised concerns about the reversibility of those changes, which that country said involved “removing the nuclear code enabling switch and interconnection box, mounting a code enabling switch inhibitor plate, removing applicable cable connectors, [and] capping applicable wire bundles.” Nuclear-capable B-52s are readily identifiable today by antennas mounted on either side of the rear fuselage.

There has been some public disagreement in recent years about the cost and complexity of re-nuclearizing the B-52s, something TWZ has explored in the past. In the annual defense policy bill, or National Defense Authorization Act (NDAA), for the 2025 Fiscal Year, Congress did give the U.S. Air Force authority to pursue this course of action after New START came to a close. However, the provision in the NDAA, which was signed into law in December 2024, did not explicitly compel the service to do so.

There could be additional downstream impacts on the U.S. nuclear arsenal if a more formalized follow-on to New START does not emerge. This might include a MIRVed configuration for future LGM-35A Sentinel ICBMs, expanded orders for nuclear-capable B-21 Raider stealth bombers, and changes to the expected loadout of the forthcoming Colombia class nuclear ballistic missile submarines.

The U.S. Air Force is already looking to ramp up B-21 production, with the possibility that this could lead to an increased overall fleet size in the future. American officials have been supportive of buying additional Raiders beyond the currently stated acquisition target of 100 aircraft. The possibility of purchasing 145 or more of the bombers has been raised in the past. The Air & Space Forces Association’s internal Mitchell Institute for Aerospace Studies think tank is set to release a new white paper next Monday that calls for a future fleet of at least 200 B-21s (as well as 300 F-47 sixth-generation fighters).

A pre-production B-21 Raider stealth bomber. USAF

Future U.S. developments could also extend to categories of nuclear weapons not currently in the American arsenal. The Air Force has at least explored the idea of a nuclear-armed hypersonic boost-glide vehicle. Retired U.S. Navy Adm. Charles Richard, who served as head of STRATCOM from 2019 to 2022, issued a new call for the U.S. military to develop a weapon of this kind at a hearing before the Senate Armed Services Committee this week. This is a capability already in service in Russia, at least to a degree. China has also been pursuing nuclear-capable weapons of this type, if they have not fielded them operationally already. The Russian and Chinese armed forces have also been working on other novel nuclear weapon capabilities, including space-based systems, which could influence future U.S. planning going forward.

It is worth noting here that any efforts to increase the total size of America’s stockpile, rather than field new capabilities that replace existing ones, would require significant investments on various levels. Last year, the Congressional Budget Office (CBO) estimated that the current slate of U.S. nuclear modernization efforts would cost nearly a trillion dollars, in total, between 2025 and 2034. The U.S. military is also now pushing ahead with the Golden Dome missile defense initiative, which is also expected to run into the hundreds of billions of dollars and will otherwise impact the strategic landscape.

China, which is in the midst of a massive buildup of its nuclear arsenal, has been a central factor in discussions to date about a follow-on strategic arms control agreement to New START. U.S. officials have pushed to include the Chinese in any future agreement, something authorities in Beijing have repeatedly balked at. China’s current nuclear arsenal is still much smaller than those of either the United States or Russia. The U.S. government has assessed that China’s total stockpile could go from approximately 600 nuclear warheads today to 1,000 by 2030, and then to 1,500 by 2035. As noted, the U.S. and Russian governments were each allowed 1,550 strategic warheads under New START. Both countries have even more nuclear weapons that were never covered by New START, to begin with, and more are in development now.

“The President’s been clear in the past that in order to have true arms control in the 21st century, it’s impossible to do something that doesn’t include China because of their vast and rapidly growing stockpile,” Secretary of State and acting National Security Advisor Marco Rubio said during a press conference yesterday in response to a question about New START.

SECRETARY RUBIO: The President has been clear that in order to have true arms control in the 21st century, it’s impossible to do something that doesn’t include China — because of their vast & rapidly growing stockpile. pic.twitter.com/FiYVUsBAVb

— Dylan Johnson (@ASDylanJohnson) February 5, 2026

New START’s expiration has fueled already growing concerns about the prospect of a new global nuclear arms race, which would not necessarily be limited to the United States, Russia, and China. The treaty’s sunset follows the steady collapse in recent years of a series of other arms control agreements between the United States and Russia, as well as other treaties intended to promote general transparency in military affairs. The U.S. withdrawal from the Intermediate-Range Nuclear Forces Treaty, or INF, in 2019 over complaints about Russian violations has already had a notable impact on the development and fielding of new nuclear and conventionally-armed missiles in both countries.

The end of New START presents a “grave moment for international peace and security,” United Nations Secretary General Antonio Guterres said in a statement yesterday.

Whether or not a temporary voluntary moratorium on the expansion of stockpiles on both sides leads to a new agreement, and one that might include China, is still an open question. Altogether, it remains to be seen now whether the New START limits continue to hold in the United States or Russia in the absence of a binding agreement.

Contact the author: joe@twz.com

Joseph has been a member of The War Zone team since early 2017. Prior to that, he was an Associate Editor at War Is Boring, and his byline has appeared in other publications, including Small Arms Review, Small Arms Defense Journal, Reuters, We Are the Mighty, and Task & Purpose.




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Germany’s Merz warns of potential escalation as US, Iran prepare for talks | Nuclear Weapons News

Friedrich Merz said concerns about a further escalation with Iran have dominated his trip to the Gulf region.

German Chancellor Friedrich Merz has warned of the threat of a military escalation in the Middle East before talks between Iran and the United States in Oman on Friday.

Speaking in Doha on Thursday, Merz said that fears of a new conflict had characterised his talks during his trip to the Gulf region.

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“In all my conversations yesterday and today, great concern has been expressed about a further escalation in the conflict with Iran,” he said during a news conference.

Merz also urged Iran to end what he called aggression and enter into talks, saying Germany would do everything it could to de-escalate the situation and work towards regional stability.

The warning came in the run-up to a crucial scheduled meeting between officials from Tehran and Washington in Muscat.

Mediators from Qatar, Turkiye and Egypt have presented Iran and the US with a framework of key principles to be discussed in the talks, including a commitment by Iran to significantly limit its uranium enrichment, two sources familiar with the negotiations have told Al Jazeera.

Before the talks, both sides appear to be struggling to find common ground on a number of issues, including what topics will be up for discussion.

Iran says the talks must be confined to its long-running nuclear dispute with Western powers, rejecting a US demand to also discuss Tehran’s ballistic missiles, and warning that pushing issues beyond the nuclear programme could jeopardise the talks.

Reporting from Washington, DC, Al Jazeera’s Kimberly Halkett said the US is eager for the talks to follow what they see as an agreed-upon format.

“That agreed-upon format includes issues broader than what the US understands Iran is willing to discuss in this initial set of talks,” she explained.

US Secretary of State Marco Rubio said on Wednesday that talks would have to include the range of Iran’s ballistic missiles, its support for armed groups around the Middle East and its treatment of its own people, in addition to its nuclear programme.

A White House official has told Al Jazeera that Jared Kushner, US President Donald Trump’s son-in-law and a key figure in his Middle East policy negotiations, and Steve Witkoff, Trump’s special envoy, have arrived in the Qatari capital, Doha, in advance of the talks.

Halkett said that Qatar is playing an instrumental role in trying to facilitate these talks, along with other regional US partners, including Egypt.

“We understand, according to a White House official, that this is perhaps part of the reason for the visit – to try and work with Qatar in an effort to try and get Iran to expand and build upon the format of these talks.”

Pressure on Iran

The talks come as the region braces for a potential US attack on Iran after US President Donald Trump ordered forces to amass in the Arabian Sea following a violent crackdown by Iran on protesters last month.

Washington has sent thousands of troops to the Middle East, as well as an aircraft carrier, other warships, fighter jets, spy planes and air refuelling tankers.

Trump has warned that “bad things” would probably happen if a deal could not be reached, ratcheting up pressure on Iran.

This is not the first time Iranian and US officials have met in a bid to revive diplomacy between the two nations, which have not had official diplomatic relations since 1980.

In June, US and Iranian officials gathered in the Omani capital to discuss a nuclear agreement, but the process stalled as Israel launched attacks on Iran, killing several military leaders and top nuclear scientists, and targeting nuclear facilities. The US later briefly joined the war, bombing several Iranian nuclear sites.

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Iran eyes progress towards US nuclear talks as tension eases | News

Iran examines regional proposals to ease tensions with the US as it expects a framework for talks in the coming days.

Iran has said that it expects progress on a framework to restart nuclear talks with the United States as unverified reports suggest the country’s president has ordered the revival of the negotiations.

Tehran said on Monday that it is examining several diplomatic processes pitched by countries in the region to ease tensions with Washington, adding that it expects a framework for talks in the coming days.

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The announcement came as Tehran and Washington appear to be pulling back from the threat of military action.

US President Donald Trump sent warships to the Middle East after Iran violently put down mass protests in January, but he then called for Tehran to make a deal to resume talks on its nuclear programme, which were abandoned in June when Iran was attacked by the US and Israel.

On Sunday, Trump said the US is talking with Iran. Tehran’s Ministry of Foreign Affairs spokesman Esmaeil Baghaei has now confirmed indirect negotiations are ongoing.

“Countries of the region are acting as mediators in the exchange of messages,” he said on Monday without giving details on the content of the negotiations.

“Several points have been addressed, and we are examining and finalising the details of each stage in the diplomatic process, which we hope to conclude in the coming days.”

The state news agency IRNA reported that Foreign Minister Abbas Araghchi had telephone calls with Saudi Arabia, Egypt and Turkiye to discuss the latest developments.

Later, the Fars news agency quoted an unnamed source as saying Pezeshkian had ordered the resumption of nuclear talks.

“Iran and the United States will hold talks on the nuclear file,” Fars reported without specifying a date. The report was also carried by the government newspaper Iran and the reformist daily Shargh.

Araghchi is due to meet US envoy Steve Witkoff for negotiations against this backdrop, Iranian news agency Tasnim also reported on Monday. Neither Tehran nor Washington has verified a meeting has been arranged.

 

The reports out of Tehran came as the region has been braced for a potential US attack as an aircraft carrier and fighter jets are sitting in the Indian Ocean close enough to assist a strike.

Trump threatened Iran in the wake of mass protests there in which thousands of people were killed in January. The demonstrations, which were triggered by economic distress and the collapse of the country’s currency, morphed into a direct challenge to the government.

However, Trump’s approach has since transformed into a demand for a nuclear deal as the US and European Union are concerned that Iran is seeking to develop nuclear weapons. Tehran insists its programme is strictly civilian.

While Iran suggested on Monday that it is moving closer to agreeing to reopen talks, it is understood that the US has set some conditions.

Iranian sources told the Reuters news agency that for talks to resume, Trump has demanded that Iran agree to end enrichment of uranium, curtail its missile programme and halt support to its network of allied armed groups in the region.

In the past, Iran has shown flexibility in discussing the nuclear file, but missiles and regional allies have long been treated as nonnegotiable.

It is not clear whether Iran would change its position now that the country urgently needs sanctions relief to improve the economy and stave off future unrest.

In June, American and Iranian officials had kicked off negotiations in Oman, but the process stalled after Israel attacked Iran and then the US bombed Iranian nuclear facilities.

On Sunday, Trump said Iran was “seriously talking” with the US but insisted, “We have very big, powerful ships heading in that direction.”

Iranian Supreme Leader Ali Khamenei has also maintained a defiant tone, warning on Sunday that any attack would result in a “regional war”.

As officials in the region geared up their diplomacy to avoid another confrontation, the EU last week designated Iran’s Islamic Revolutionary Guard Corps as a “terrorist organisation”.

On Monday, Iran said it had summoned all EU envoys in recent days over the move, adding that it was considering “countermeasures”.

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IAEA: Backup systems help to ensure nuclear reactors’ safety

Jan. 30 (UPI) — While Russia and Ukraine continue targeting each other’s energy infrastructure amid their war, the International Atomic Energy Agency leader said backup systems are critical for ensuring safety.

IAEA Director General Rafael Grossi on Friday told the agency’s board of governors the war in Ukraine is nearing its fifth year and poses the world’s greatest risk for a nuclear accident.

Ukraine has 15 nuclear reactors that generate about half of the nation’s electricity, and Russia has 36 operable reactors that generate up to 20% of its electricity, according to the World Nuclear Association.

The number of reactors in the two warring nations highlights the need for backup systems in those nations and all others that contain nuclear reactors to prevent accidents and ensure reliable off-site power, Grossi said.

“There must be secure off-site power from the grid for all nuclear sites,” he told the board of governors.

Grossi cited Russia’s control of the Zaporizhzhya Nuclear Power Plant in southeastern Ukraine as especially troubling, saying “all efforts should be made to ensure off-site power remains available and secure at all times.”

The nuclear power plant is Europe’s largest and was reconnected to its last active power backup system on Jan. 19 after undergoing repairs amid a temporary cease-fire between the two nations.

The backup system helps to ensure the reactor is cooled and supports other important safety systems, which Grossi said must remain “available and secure at all times” to prevent a nuclear accident.

It went offline after being damaged on Jan. 2 due to military actions, which forced the facility to rely on its main power line to cool its six shutdown reactors and spent-fuel pools.

The IAEA also is monitoring the facility’s ability to operate during the winter months, including ensuring water does not freeze its respective cooling and sprinkler ponds.

Grossi also warned of a potential calamity if some or all of Ukraine’s electrical substations were to go offline.

“Damage to them undermines nuclear safety and must be avoided,” Grossi said, adding that a group of agency experts are examining 10 substations amid Russian military strikes on Ukraine’s power infrastructure.

Other nuclear facilities that pose significant concerns include Ukraine’s Chernobyl site, which recently relied on diesel-powered generators to supply backup power until repairs were completed on its damaged substation power lines.

While the IAEA and others have managed to prevent a nuclear accident amid the ongoing war, Grossi said the “best way to ensure nuclear safety and security is to bring this conflict to an end.”

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UN nuclear watchdog discusses Ukraine nuclear safety risks | Nuclear Energy News

Russian attacks on Ukraine’s electrical substations could cut power to nuclear plants, increasing risks of meltdown.

The United Nations nuclear watchdog has held a special session on Ukraine amid growing fears that Russian attacks on its energy facilities could trigger a nuclear accident.

Rafael Grossi, director-general of the International Atomic Energy Agency (IAEA), said at the start of Friday’s extraordinary board meeting in Vienna that the war in Ukraine posed “the world’s biggest threat to nuclear safety”.

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The meeting was held as an IAEA expert mission conducted a weeks-long inspection of 10 electrical substations that Grossi described as “crucial to nuclear safety”.

Although nuclear power plants generate power themselves, they rely on an uninterrupted supply of external power from electrical substations to maintain reactor cooling.

Ukraine has four nuclear power plants, three of them under Kyiv’s control, with the fourth and biggest in Zaporizhzhia occupied by Russian forces since the early days of their full-scale invasion in 2022.

Moscow and Kyiv have repeatedly accused each other of risking a nuclear catastrophe by attacking the Zaporizhzhia site.

The plant’s six reactors have been shut down since the occupation, but the site still needs electricity to maintain its cooling and security systems.

Earlier this month, Russia and Ukraine paused local hostilities to allow repairs on the last remaining backup power line supplying the plant, which was damaged by military activity in January.

Ukraine is also home to the former Chornobyl plant, the site of the world’s worst nuclear accident in 1986. The site’s protective shield containing radioactive material was damaged last year in a drone strike allegedly carried out by Russia.

Status of energy ceasefire unclear

The four-hour IAEA meeting, which aimed to increase pressure on Russia, was called at the request of the Netherlands, with the support of at least 11 other countries.

Russia’s “ongoing and daily” attacks against Ukraine’s energy infrastructure in recent weeks have caused significant damage, Netherlands’ Ambassador Peter Potman told the board.

“Not only does this leave millions of Ukrainians in the cold and dark during a very harsh winter, but it is also … bringing the prospect of a nuclear accident to the very precipice of becoming a reality,” he said.

Ukraine’s ambassador, Yuriy Vitrenko, said it was “high time” for the IAEA to “shine an additional spotlight on the threat to nuclear safety and security in Europe” caused by Russia’s “systematic and deliberate” attacks.

Russian Ambassador Mikhail Ulyanov dismissed the board’s gathering as “absolutely politically motivated”, adding there was “no real need to hold such a meeting today”.

The status of a current weeklong moratorium on attacks targeting energy infrastructure is currently unclear.

United States President Donald Trump said Thursday that Russia had agreed to his request not to attack Ukraine’s energy infrastructure for a week.

On Friday, Ukrainian President Volodymyr Zelenskyy confirmed that neither Moscow nor Kyiv had conducted strikes ⁠on energy targets from Thursday night onwards.

However, Kremlin spokesman Dmitry Peskov later suggested the pause in attacks would end on Sunday.

 

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US defense chief warns Iran against nuclear pursuit, says US ready to act – Middle East Monitor

US Defense Secretary Pete Hegseth said Thursday the US is prepared to use “all options” to prevent Iran from pursuing nuclear weapons, while emphasizing that Washington is still leaving room for a diplomatic deal, Anadolu reports.

“With Iran right now, ensuring that they have all the options to make a deal. They should not pursue nuclear capabilities,” Hegseth said at a Cabinet meeting along with US President Donald Trump.

Trump reiterated Wednesday that a “massive armada” is headed to Iran, expressing hope that Tehran will “come to the table” and negotiate with Washington.

READ: Iran warns of uncontrollable consequences if attacked

Hegseth stressed that the Pentagon stands ready to carry out any directives issued by Trump, signaling that military options remain firmly on the table if diplomacy fails.

“We will be prepared to deliver whatever this president expects of the War Department, just like we did this month,” he said, referring to the US capture of Venezuelan President Nicolas Maduro on Jan. 3.

Iranian officials, meanwhile, have reacted strongly to the latest threat issued by Trump, as a US military fleet moves toward Iranian waters amid escalating tensions between the longtime adversaries.

READ: Israeli, Saudi officials visit US for Iran talks amid military buildup: Report

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Oil prices climb as Trump warns Iran ‘time is running out’ for nuclear deal

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Oil prices rose on Thursday after US President Donald Trump warned Iran that “time is running out” and said a “massive armada” was heading towards the region if Tehran failed to agree to a nuclear non-proliferation deal.

In a Truth Social post, Trump said a fleet larger than the one sent to Venezuela was ready to “rapidly fulfil its mission, with speed and violence, if necessary” if Iran refused to negotiate a deal guaranteeing “no nuclear weapons”.

Global benchmark Brent rose by about 2.02%, trading at around $68.73 per barrel, while US crude (WTI) hovered around 2.15% higher, at $64.57 per barrel.

Trump previously threatened to attack Iran if it killed protesters during the ongoing protest movement across the country. Estimates of those killed range from around 6,000 to as many as 30,000, according to various reports.

Oil delivery disruptions

If the US were to escalate militarily, it could disrupt oil flows to countries that still trade with Iran.

Iran’s economy is already under heavy pressure from US secondary financial sanctions on its banking and energy sectors, compounded by the reimposition of JCPOA snapback sanctions.

These measures have severely limited Iran’s access to the Western financial system and constrained its ability to trade openly.

As a result, Iranian exports rely heavily on so-called “dark fleets,” ship-to-ship transfers and intermediary routes designed to obscure cargo origins along major maritime corridors.

Yet despite years of sanctions, Iran has retained access to oil markets, underlining the difficulty of fully enforcing restrictions on a high-value global commodity.

“Iran has a number of markets for its oil, despite the Western sanctions regime,” said Dmitry Grozubinski, a senior advisor on international trade policy at Aurora Macro Strategies.

China at centre of enforcement risk

China remains the largest buyer, with reports suggesting Iranian crude is often rebranded as Malaysian or Gulf-origin oil before entering the country.

“Independent refineries are purchasing it using dark fleet vessels, with transactions conducted through small private banks and in renminbi,” Grozubinski said.

Other destinations for Iranian oil and derivatives include Iraq, the UAE and Turkey, further complicating enforcement.

“It’s extremely difficult to maintain comprehensive sanctions on oil,” Grozubinski said, “especially when it requires policing transactions between Iran and states that don’t fully share Western priorities.”

China currently imports an estimated 1.2 to 1.4 million barrels of Iranian oil per day — around 80 to 90% of Iran’s crude exports.

US escalation could provoke Beijing

That dependence makes Beijing the central variable in any escalation. Analysts say China would be the most likely major economy to resist compliance and retaliate.

“Beijing has already signalled it would respond if Trump follows through,” said Dan Alamariu, chief geopolitical strategist at Alpine Macro, warning of renewed US–China trade friction.

One risk raised by analysts is the potential for China to again restrict exports of rare earths — a tool it has previously used during periods of trade tension — although such a move is considered unlikely in the short term.

“It’s not the base case,” Alamariu said, “but it’s not impossible.”

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