Airmen from the 28th Civil Engineer Squadron Structures Flight hang a scale model of an MQ-9 Reaper in the 28th Bomb Wing Headquarters lobby at Ellsworth Air Force Base, S.D., May 1, 2013. The MQ-9 model is the newest addition to the lobby, which also features scale models of a B-1 and B-17, aircraft that either currently or historically operated from the base. (U.S. Air Force photo by Tech. Sgt. Nathan Gallahan/Released)