U.S. Air Force Maj. Matthew Callow gets hosed down after returning from his last flight in a B-52H Stratofortress, Feb. 5, 2015, Barksdale Air Force Base, La. Callow, a B-52 pilot, is retiring from the Air Force after 20 years of service. (U.S. Air Force photo by Master Sgt. Greg Steele/Released)