Hormiguita!

Largest U.S.-Mexican tunnel is discovered
In late January, 2006, the largest smuggling tunnel to date was found on the US-Mexico border. The 2400-foot-long (720m) tunnel runs from a warehouse near the Tijuana airport to a warehouse in San Diego. When discovered, it was devoid of people, but it did contain 2 tons of marijuana. It was 5 feet high and up to 90 feet deep. The floor was made of cement and the walls were dried dirt, with lights lining one side and a ventilation system to keep fresh air circulating. Authorities said it was unclear how long the tunnel had been in operation.