High-tech virtual wall is the latest defense at the US-Mexico border

The feds have turned to cutting-edge cameras developed by a virtual reality wunderkind to help them monitor the southern border — by creating an invisible border wall.

And they’re now being installed at different points along the nearly 2,000 miles of the US-Mexico border. "The ASTs are in remote locations that are difficult to reach," Border Patrol agent Joel Freeland recently told The Post. "They operate 24-hours a day and are environmentally friendly because they rely entirely on solar power."