Huge underground drug tunnel with subterranean rail system discovered at US/Mexico border

Mexican army troops have discovered a massive drug tunnel beneath the San Diego-Tijuana border: a 1,800-foot passageway in an Otay Mesa warehouse, where U.S. authorities seized more than 20 tons of pot. "The passageway, equipped with lighting, ventilation and a rail system, is one of the few unearthed in recent years that appears to have been fully operational."