Cross-border tunnel extends 400 yards between U.S. and Mexico

U.S. authorities on Wednesday seized a cross-border tunnel that ran the length of four football fields from a restaurant in Mexicali, Mexico, to a newly built house in Calexico, California, following an investigation that netted more than a ton of marijuana and resulted in four arrests.

The tunnel was the 12th completed secret passage that U.S. authorities have discovered along California's border with Mexico since 2006. They have found more than 75 along the entire U.S.-Mexico border in the last five years, mostly . . .