Tunnel vision: Border Patrol agents to spot tunnels with advanced ground-penetrating radar
Monday, June 29, 2009 - 15:07
in Physics & Chemistry
Criminals of all kinds are digging tunnels along the U.S. border at a fast and furious pace. Of every tunnel ever discovered by U.S. border patrol agents, 60 percent have been found in the last three years. Agents spot a new one every month.