OTAY MESA, CA - JANUARY 30: A Police agent with U.S. Immigration and Customs Enforcement stands guard in a drug tunnel found along the Mexico/USA Border at a warehouse January 30, 2006 in Otay Mesa, California. The tunnel runs 2,400 feet, has lighting, ventilation and equipment to pump out ground water and was used to funnel drugs into the United States from Mexico. (Photo by Sandy Huffaker/Getty Images)