A group of illegal immigrants walk with bottles of water shortly before nightfall as they cross the desert between Sasabe, Mexico, and Sasabe, Ariz., in April 2006. (Associated Press)

Photo by: GREGORY BULL

A group of illegal immigrants walk with bottles of water shortly before nightfall as they cross the desert between Sasabe, Mexico, and Sasabe, Ariz., in April 2006. (Associated Press)