CROSS-BORDER TUNNEL DISCOVERIESMay 25, 1999: A cross-border tunnel in Naco is discovered. It: links a trailer on the U.S. side to homes in Naco, Sonora.
Jan. 19, 1999: Two tunnels are found in Nogales, Ariz. One connects a house to Nogales Wash, allowing drug traffickers to cross the border undetected. Another, longer tunnel connects an apartment next to the house to a crawl space beneath Sacred Heart Catholic Church. Its purpose remains unclear.
1995: A 200-yard tunnel runs from a Nogales, Ariz., Methodist: church into Mexico. It had been shut down before it was discovered.
1990: Probably the most famous tunnel is discovered running from a luxury home in Aqua Prieta, Sonora, to a storeroom under a: Douglas cement warehouse. It's 200 feet long, 30 feet wide and concrete-lined.