Senior Airman Ellery Lopez, 7th Aircraft Maintenance Squadron crew chief, waits to signal out a B-1B Lancer assigned to the 7th Bomb Wing, Dyess Air Force Base, Texas, during Green Flag 14-6 April 24, 2014, at Nellis Air Force Base, Nev. The Green Flag exercise provides aircrew and maintainers training during simulated warfare conditions. (U.S. Air Force photo by Senior Airman Christopher Tam/Released)