Packages containing marijuana are seen next to a tunnel found under the Mexico-U.S. border in Tijuana November 29, 2011. Police discovered the tunnel running to California from Mexico and seized packages containing marijuana. The tunnel measures around 800 meters from the Mexican border city of Tijuana to Otay Mesa industrial park south of San Diego. according to authorities. REUTERS/Mexico Police/Handout (MEXICO - Tags: DRUGS SOCIETY CRIME LAW) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS
A look at various smuggling tunnels across the U.S.-Mexico border.