Senior Airman Andrew Lawson, 7th Aircraft Maintenance Squadron aerospace propulsion journeyman, places exhaust plugs on 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. Green Flag is a realistic air-land integration combat training exercise that involves the U.S. and its allies. (U.S. Air Force photo by Senior Airman Christopher Tam/Released)