09-03-2016 TUNNEL

Inside The Tunnels Mexican Cartels Use To Smuggle Drugs Across The Border

Tunneling Under the Border With Mexico. On the U.S.-Mexico border, a large fence has done little to deter enterprising drug smugglers. In Nogales, Ariz., they’ve been digging out tunnels for years in order to cross the border undetected.

Produced by: NEIL COLLIER AND RON NIXON

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