Brig. Gen. Carl E. Schaefer (second from left), 412th Test Wing commander, poses for a group photo after presenting challenge coins to 912th Aircraft Maintenance Squadron personnel on behalf of Gen. Ellen M. Pawlikowski, commander of Air Force Materiel Command. Pawlikowski issued the coins as thanks for efforts undertaken to make her flight possible aboard a B-52 Stratofortress during a sortie earlier in May. (U.S. Air Force photo by Christopher Okula)