U.S Air Force Col. Keith Schultz, commander of the 307th Operations Group, gives a thumb up after landing a B-52H Stratofortress for the last time at Barksdale Air Force Base, La. on Aug. 2, 2015. Schultz is a command pilot with over 7,000 flying hours of which 472 were flown in combat in the bomber. (U.S. Air Force photo by Master Sgt. Dachelle Melville/Released)