Crackdown leads to drop in illegal immigration

msnbc.msn.com — Migrants carry water along their journey to the United States in the border town of Sasabe, Mexico. A U.S. crackdown, tighter security and a more perilous and expensive journey are persuading many who try to sneak into the U.S. to give up sooner. May 2, 2008 View in Crawl 4