Meet the U.S. Border Patrol 'Tunnel Rats' Who Work 18 Feet Beneath the Mexican Border

Deep below the U.S.-Mexico border are scores of illegal tunnels used to smuggle weed, opioids—even humans. The Border Patrol's "tunnel rats" are on the case.

Meet the U.S. Border Patrol 'Tunnel Rats' Who Work 18 Feet Beneath the Mexican Border
Deep below the U.S.-Mexico border are scores of illegal tunnels used to smuggle weed, opioids—even humans. The Border Patrol's "tunnel rats" are on the case.