A soldier looks down into a tunnel found under the Mexico-U.S. border in Tijuana November 30, 2011. Police discovered the tunnel running to California from Mexico and authorities from both countries seized more than 32 tons of marijuana. The tunnel is equipped with a hydraulic entry, an elevator and electric rail cars, according to a statement released by the U.S. Immigration and Customs Enforcement. REUTERS/Jorge Duenes (MEXICO - Tags: CRIME LAW DRUGS SOCIETY)
Mexico's smuggling tunnels
A look at various smuggling tunnels across the U.S.-Mexico border.