A U.S. Army Pfc., left, and a U.S. Air Force Tech. Sgt., both with the Pennsylvania National Guard, perform an engine inspection on their vehicle in Yuma, Ariz., Oct. 16, 2006, during a desert driving training exercise. More than 6,000 National Guardsmen from across the nation are working in partnership with the U.S. Border Patrol as part of Operation Jump Start. (DoD photo by Staff Sgt. Dan Heaton, U.S. Air Force)
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