FILE - In this Jan. 18, 2009 file photo, a U.S. Border Patrol vehicle sits parked in front of a crowd of people peering through the U.S.-Mexico border fence at Border Field State Park

 

              FILE -  In this Jan. 18, 2009 file photo, a U.S. Border Patrol vehicle sits parked in front of a crowd of people peering through the U.S.-Mexico border fence at Border Field State Park
FILE - In this Jan. 18, 2009 file photo, a U.S. Border Patrol vehicle sits parked in front of a crowd of people peering through the U.S.-Mexico border fence at Border Field State Park in San Diego. At one time, before the enhanced border fence in the area, the San Diego area held the most popular routes for illegal immigrants heading into the U.S. (AP Photo/Denis Poroy)