Staff Sgt. Casey Durham replaces the trailing edge of a flap from the KC-135 Stratotanker at Fairchild Air Force Base, Washington, Aug. 20, 2014. When the flaps are damaged or need replaced, a new trailing edge is drilled and installed for pivot installation. As an aircraft structural craftsman, Durham evaluates damage and corrosion of the tanker and repairs it. Durham is an aircraft structural craftsman from the 92nd Maintenance Squadron. (U.S. Air Force photo/Staff Sgt. Samantha Krolikowski)