Christopher Duhe, an Air Reserve Technician at the 917th Aircraft Maintenance Squadron, cleans the floor of the A-10 Hangar at Barksdale Air Force Base, La., March 30, 2012. Although the floor in the hangar is cleaned on a regular basis, Duhe, who is also a crew chief for the A-10 Thunderbolt II, was preparing for a retirement ceremony scheduled to be held in the hangar during the 917th Fighter Group’s Unit Training Assembly this weekend. (U.S. Air Force photo by Master Sgt. Jeff Walston)