Another article from the engineering.com website linked in this article. This is just technology available right now, not what's coming, but frankly the "invisible wall" is potentially a lot scarier than one we can climb over. We must get liberals and others devoted to the rights of the people in control of government.
"And, more than almost any border wall before it, the new border replaces on-the-scene manpower with surveillance devices like underground motion sensors, remote-operated cameras, long-range radar towers, aerostats (balloons and blimps) and drones.
Currently, there are more than 12,000 remote sensors buried along the border and three radar-enabled towers that can track people from up to 7 miles away. Both systems are linked with centralized cameras, so that any disturbances can be monitored by Border Patrol agents in a centralized location. Agents should be able to pick up on disturbances, monitor them for their level of “threat,” and only leave their locations to deal with actual attempted border-crossings. CBP also has a small fleet of Predator drones that enable the agency to photograph huge swathes of the border from the air.
Remote sensors are particularly useful in the Rio Grande Valley section of the border, where protected natural parks prevent border agents from clearing dense foliage around the border. Manuel Padilla Jr., the Border Patrol sector chief for the area, told the New York Times that more sensors are necessary to secure the area: “In the absence of being able to get in there, we need to be able to see what’s going on so we can catch drug trafficking and other activity before those who are doing it reach cities in the region.”
As heavy-tech as the areas between crossings are, the “invisible wall” becomes even stronger at the areas around authorized crossings. At crossover points like the one in Hidalgo, Texas, automatic license plate readers (ALPRs) take photos of the license plates, cars and drivers of border-crossing cars, which are then run through a database that holds information about criminal records and immigration law violations. Even if the search doesn’t trigger an alert, the information the ALPR collects is stored in the database, giving Border Patrol officials a complete record of who has crossed the border, and when.
But perhaps the most advanced use of border security technology may be used far away from the border: the use of biometric information at airports. U.S. Customs and Border Protection’s Biometric Air Exit program takes travelers' biometric information as they leave the United States by air. In 2004, CBP developed a program that uses fingerprints for biometric identification, and it’s currently developing and expanding a facial recognition program. These programs are implemented in partnership with airlines. And the Goodlatte-McCaul bill, which is currently making its way through Congress, would expand the use of biometric information even further, allowing CBP to take biometric information from everyone leaving the U.S.
At the 2016 Annual Border Security Expo in San Antonio, FLIR Systems sales rep Bryan Block jokingly told VICE, “I'd tell Mr. Trump we can build him a wall—a radar wall, of 360-degree radar surveillance.” Today, that invisible wall is looking less and less like a joke.
https://www.engineering.com/BIM/ArticleID/16775/Border-Walls-Get-Teched-Out.aspx?e_src=relart
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