May. 1, 2008
SASABE, Mexico - The sandy streets of Sasabe are empty. Migrant smugglers have to hunt for business at border-town shelters. Many deported migrants give up after one try, taking their government up on free bus rides home.

A U.S. crackdown is causing the longest and most significant drop in illegal migration from Mexico since the Sept. 11 attacks. Officials say the U.S. economic downturn, tighter security and a more perilous and expensive journey are persuading many who try to sneak into the U.S. to give up sooner.

Border Patrol arrests are down 17 percent so far this year along the U.S.-Mexico border after falling 20 percent all of last fiscal year and 8 percent the year before that. While it's impossible to know how many people are crossing illegally, the Patrol uses apprehensions to estimate the ebb and flow of traffic.

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