An agent from the San Diego Tunnel Task Force walks through part of the passageway of a tunnel found under the U.S.-Mexico border, in San Diego, November 26, 2010. U.S. border agents said on Friday they had found a half-mile-long tunnel under the U.S.-Mexico border and seized a significant amount of marijuana at the San Diego area warehouse where it ends. REUTERS/U.S. Immigration and Customs Enforcement (ICE)/Handout (UNITED STATES - Tags: CRIME LAW POLITICS SOCIETY) 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
Mexico's smuggling tunnels
A look at various smuggling tunnels across the U.S.-Mexico border.