A B-1 bomber takes to the skies to participate in a Green Flag training exercise at Nellis Air Force Base, Nev., from the flightline at Ellsworth Air Force Base, S.D., Oct. 25, 2012. The exercise is designed to ensure aircrews and maintenance personnel are prepared to carry out the 28th Bomb Wing's mission both at home and in a deployed environment. (U.S. Air Force photo by Airman Ashley J. Woolridge/Released)