In this Oct. 20, 2010, file photo, a customs official stands guard at the port of entry along the U.S.-Mexico border in Calexico, Calif. (AP Photo/Gregory Bull, File)
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In this Oct. 20, 2010, file photo, a customs official stands guard at the port of entry along the U.S.-Mexico border in Calexico, Calif. (AP Photo/Gregory Bull, File)
