Staff Sgt. Thomas Hughes, a loadmaster assigned to the 317th Airlift Squadron, directs a C-17 Globemaster III aircraft as it backs up in preparation for a combat offload during a training mission at Joint Base Charleston, S.C., March 22, 2010. He assures that all is clear on the backside of his crew's machine. (U.S. Air Force photo by Staff Sgt. Jacob N. Bailey / Released)