Illegal immigrants easily step over a fallen barbed-wire fence between Mexico and the United States near the town of Sasabe, Mexico, in 2004. The number of apprehensions of illegal border-crossers is down while the number of deaths in the desert is high. (Associated Press)

Illegal immigrants easily step over a fallen barbed-wire fence between Mexico and the United States near the town of Sasabe, Mexico, in 2004. The number of apprehensions of illegal border-crossers is down while the number of deaths in the desert is high. (Associated Press)