Biggest problem with wall of tunneling. DPLS sensors can detect a mouse at 200m. They can accurately identify a child vs a teen vs an adult. Trump wants this border secure and he wants boots on the ground. Also if we wants re-election he has to make good on his biggest campaign promise, a secured border. Without the sensors, no security. With all the billions and billions of dollars going toward defense and the wall, DPLS will get their play