Lt. Gen. Robin Rand, 12th Air Force commander, hands the microphone to Chief Master Sgt. Calvin Williams, 12th Air Force command chief, during his commanders call at Ellsworth Air Force Base, S.D. April 5, 2013. Lt. Gen. Rand and the chief were both in town to talk with 28th Bomb Wing Airmen and celebrate the wing's change of command, which happened later in the afternoon. (U.S. Air Force photo by Tech. Sgt. Nathan Gallahan/Released)