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Lt. Gen. Bruce Litchfield, Air Force Sustainment Center commander, speaks during the F-35A Lightning II Joint Strike Fighter commemoration ceremony Sept. 20, 2013, at Hill Air Force Base, Utah. Hill, Lockheed Martin, Utah elected officials and community members gathered for a ceremony to commemorate the beginning of F-35 depot maintenance at the Ogden Air Logistics Complex. The F-35A is a multi-variant, multi-role, fifth generation fighter, and will undergo organic depot modification work at Hill AFB. (U.S. Air Force photo/Alex R. Lloyd)