sensor

PHOENIX — For decades, all that separated the U.S. from Mexico was barbed wire.

Now, after a massive infusion of cash from Congress, President Trump’s administration is swiftly building what it has dubbed a “smart wall,” a combination of 30-foot-tall steel fencing and an array of sophisticated technology like sensors, cameras and towers allowing Border Patrol to surveil the territory.

The wall is under heavy scrutiny for the billions of dollars being dedicated to it when border crossings are at their lowest in decades. Critics say the U.S. is militarizing the border as it increasingly deploys sophisticated surveillance technology to the area, impacting local communities.

“We are seeing a massive expansion of surveillance and surveillance technology across the borderlands,” said Ricky Garza, border policy counsel at the Southern Border Communities Coalition, an advocacy group. “The wall in all its forms is harmful to communities.”

Officials say the technology is complementary to the physical wall and frees up agents for other tasks.

“It’s a smart wall. It’s not just a barrier,” Customs and Border Protection Commissioner Rodney Scott said during recent congressional testimony. “It maximizes the use of our most valuable resource, which is our agents.”

Contracts for hundreds of miles of wall already inked

The wall has been a top priority for Trump, a Republican, since he first ran for president.

During the administration of President Joe Biden, a Democrat, the border emerged as a flashpoint, with thousands of people seeking to cross into the country each day. Those numbers started to taper off shortly before Trump returned to office last year and then slowed to a trickle, with his broader immigration crackdown serving as a deterrent for would-be migrants.

Flush with $46 billion to finish the wall after an infusion by Congress for immigration enforcement, CBP is inking tens of billions of dollars in contracts to build the wall and push along the president’s signature project.

Homeland Security Secretary Markwayne Mullin said recently that a preliminary part of the wall will be finished by “this time next year.” Scott said his agency is putting up 6 miles of wall a week.

Hundreds of miles had already been built before Trump returned to office. As of mid-June 2026, CBP has erected another 74 miles and aims to build hundreds more. There is no wall planned for roughly 535 miles of the roughly 2,000-mile-long border, because rugged terrain already serves as a barrier. Ground sensors and towers will be used instead.

CBP is also going back to hundreds of miles of already built wall and adding more technology, lights and roads. Along the long stretches of river in Texas that mark the border with Mexico, they’re deploying 12- to 15-foot-long cylinder-shaped buoys meant to keep migrants or smugglers from crossing the border.

More technology being deployed on the border

Technology is playing a greater role in the Trump administration’s effort to make illegal crossings along the border more difficult, part of a broader transformation of CBP in the years since Sept. 11, 2001, into an intelligence operation with a mass surveillance network whose reach extends far beyond the nation’s frontiers, according to reporting by The Associated Press.

And critics say the border technology poses a threat.

The Southern Border Communities Coalition says surveillance technologies can push migrants into more dangerous routes to avoid being detected.

Garza, the group’s policy counsel, warned that surveillance technology infringes on the privacy rights of border residents and that locals have found ground sensors used to detect smuggler or migrant traffic placed on their property without their consent.

Nayda Alvarez and her relatives own land along the Rio Grande roughly 125 miles inland from the Gulf of Mexico. She has found cameras placed on her family’s land, and just last week she spotted a surveillance tower about a quarter of a mile down the river from her house.

“Are we expecting a war or something?” she said. “It doesn’t make me feel safer.”

Dave Maass, director of investigations for the Electronic Frontier Foundation, a nonprofit that focuses on civil liberties related to digital technology, said the technology has made the border area “a hostile environment” for locals and would-be migrants.

The foundation has published a guide on the various types of surveillance towers in use along the southern border designed to help local residents.

These can range from fixed towers with video, infrared and radar technologies that have a range of roughly 8 miles to remote video surveillance systems that have cameras and a spotlight fixed on top. Some are mounted on the backs of trucks so agents can drive them to different parts of the border.

Increasingly, these towers are autonomous. They can scan an area, analyze what they’re seeing using artificial intelligence and alert Border Patrol agents to something suspicious. Proponents say this helps keep Border Patrol agents out in the field instead of sitting in front of computer screens watching for activity. But it also increases AI decision-making along the border when experts have warned about the technology’s potential for bias or other problems.

The big GOP tax cuts and spending bill passed by Congress last summer requires that CBP buys only the autonomous towers, and the department is deploying an additional 95.

Underground, buried fiberoptic cables can sense movement, capturing data that is also then analyzed by AI.

“We follow the contour of the land. We go through trees. We go down into the river banks. We can go absolutely everywhere,” said Magnus McEwen-King, CEO of Sintela, which has a contract with CBP to install the cables. He spoke at a recent border security expo in Phoenix, where some of the technology was on display.

CBP also uses ground sensors and trail cameras to detect smuggling routes.

Concerns over cost and future plans

The nonpartisan watchdog group Taxpayers for Common Sense has questioned both the huge amounts of money for the wall-building and whether taxpayers are getting their money’s worth.

In 2011, under Democratic President Obama, Homeland Security Secretary Janet Napolitano pulled the plug on a project to build a “virtual wall” of integrated technology like radars, sensors and cameras across the entire border after it ran over budget, faced technological glitches and was behind schedule.

Josh Sewell, director of research and policy at Taxpayers for Common Sense, said the organization would like to see more “robust evaluation” of the technologies being used to avoid similar scenarios. And he criticized the Trump administration for lack of oversight on how the money is being spent, a charge CBP has denied, citing “oversight mechanism.”

In the Big Bend area of southern Texas, opposition to the department’s wall-building plans gathered strong bipartisan support especially in the most sensitive areas that run through a state and national park and a wildlife area.

CBP now says it is not planning to build a 30-foot-high bollard wall in those areas. Its recently announced plans include installing patrol roads and some barriers designed to stop cars and using detection technologies.

Clara Benson, who is one of the founders of the No Big Bend Wall coalition, says bright lights in the area designed to illuminate the border could pollute the skies in an area renowned for having some of the best views of the stars. Even without a 30-foot-tall steel wall running through the land, there is concern about CBP’s plans.

“There’s still a lot of fear and dread that the plan is still going to be quite damaging,” she said.

Santana writes for the Associated Press.

Boeing’s 757 Flying Test Bed was recently spotted carrying a stealthy underwing infrared sensor pod under its fuselage. This may be the first time this aircraft, better known as ‘The Catfish’ because of its unique and highly modified nose profile, has ever been seen lugging around a store on this station. The pod itself is part of a larger “Raptor 2.0″ upgrade package being developed for the F-22. Catfish has served as a key systems integration testbed for the Raptor since the 1990s.

Jerod Harris caught Catfish with the pod under its belly as it came in to land at Edwards Air Force Base in California on Monday. Edwards is the main hub for U.S. Air Force test and evaluation activities, and Catfish has been seen there many times over the years as part of its work. The aircraft, which carries the U.S. civil registration code N757A, also happens to be the first 757 ever built, and took to the skies for the first time back in 1982.

As already noted, Catfish has already played a central role in the story of F-22. The aircraft’s heavily modified nose is designed to directly replicate that of the Raptor, and contains the same AN/APG-77 active electronically scanned array (AESA) radar as the fighter. The swept wings on top of the cockpit were also designed to support testing of the conformal antennas for the Raptor’s AN/ALR-94 electronic support measures system and other components of its ‘fused’ sensor suite. The aircraft has supported the development of a wide array of other systems for the F-22, and is packed inside with additional equipment to support those needs in particular, including a replica of the Raptor’s cockpit. You can read more about Catfish and its general history here.

So it is not surprising then that the heavily modified 757 would also be used now to help with continued testing of the new underwing infrared sensor pods for the Raptor. Carrying the pod under the forward end of the fuselage would offer the sensors inside a good open field of view to the front, as well as to the left, right, and down.

The stealthy pods have been test-flown on actual F-22s for years now. At the same time, there are only a limited number of Raptors available, in total, and they are notoriously fuel-hungry, maintenance-intensive, and otherwise expensive to operate. If the particular test plan calls just for level flight, and over extended periods of time, a platform like Catfish could be an attractive alternative. With space for dozens of engineers and technicians in its main cabin, and workstations for them, the aircraft would also offer very different options for testing and evaluating the pod while in-flight. A North American Sabreliner business jet has also been used to test these pods in the past.

The capability, in general, for Catfish to carry stores under its fuselage might open up additional possibilities for utilizing the aircraft in support of other testing efforts, if it hasn’t already.

Catfish would also be well suited to supporting testing of other elements of the Raptor 2.0 package. Under the current plan, the Air Force’s F-22s are also set to get a new integrated distributed infrared search and track (IRST) system called the Infrared Defensive System (IRDS).

IRST systems have seen a renaissance across the U.S. military in recent years, as well as elsewhere globally. IRSTs detect and track targets via their infrared emissions, making them particularly valuable for helping spot stealthy targets with features designed to reduce their radar cross-sections. The sensors are also immune to radio frequency electronic warfare jamming and operate passively, meaning they do not emit signals that could alert a target to the fact they are being tracked. IRSTs can also be used to cue or otherwise be linked to other sensors, including AESA radars. This data fusion can provide higher fidelity tracks of multiple targets, as well as improved situational awareness overall.

Increased demand for IRSTs has led to a commensurate increase in demand for testing using multiple platforms. This, in turn, has been a major component of a general uptick in U.S. military flight testing in recent years to support a variety of new, advanced programs.

Other elements of the Raptor 2.0 upgrade plan include new stealthy drop tanks, improvements to the jet’s stealthy features, radar capabilities, electronic warfare suite, and more, as you can read about in detail here.

At least a portion of the Raptor fleet is also set to receive modifications to enable them to act as airborne controllers for Collaborative Combat Aircraft (CCA) drones. The Air Force’s F-22s are set to be the service’s first tactical jets to be used in that role, though others will follow.

The F-22 upgrade work is reflective of current Air Force plans to keep the Raptors in service for decades to come. In 2024, the Air Force said it no longer had a firm retirement schedule for the fighters.

Raptors have been used in recent years as surrogates to support work on the Next Generation Air Dominance (NGAD) initiative, a component of which is Boeing’s F-47 sixth-generation fighter. As such, Catfish will have already been feeding into those developments, which are now firmly a top Air Force priority.

At the same time, Catfish is now 44 years old. Boeing 757s, in general, are increasingly disappearing from service globally as they become more complicated and cost-intensive to sustain. Especially with the work ongoing now on the F-47, it seems likely Boeing will start looking toward a new highly specialized testbed aircraft modified to reflect the particular physical geometry, unique avionics, and other features of the new fighter.

Similarly, the F-35 family also has a dedicated test jet, the Boeing 737-300-based Cooperative Avionics Testbed, nicknamed the CATbird. There are several other airliner and business jet-based testbeds flying globally today, though Catfish is certainly one of the largest and most visually distinctive. Improving digital simulation and modeling tools could allow for less reliance on surrogate testbed aircraft in the future, but they will in no way be eliminated.

China notably has something of a clone of Catfish based on a Russian-made Tupolev Tu-204C airliner, which itself was designed as an analog to the 757. The Chinese jet’s primary purpose has been supporting the development of the J-20 stealth fighter, the country’s closest answer to the F-22.

In the meantime, Boeing Catfish remains a very important part of continued work to improve and expand the capabilities of the F-22. This now extends to testing of specialized underwing pods for the Raptor.

Special thanks again to Jerod Harris for sharing his pictures of Catfish carrying the stealthy sensor pod with us.

Contact the author: joe@twz.com