U.S. Air Force Senior Airman Jonathon Hartman directs the flight crew of a B-1B Lancer aircraft during Green Flag-West 11-10 at Nellis Air Force Base, Nev., on Sept. 20, 2011. Green Flag-West is a joint U.S. Air Force-U.S. Army unscripted battle exercise designed to train participants for complex air defense scenarios while supporting high-intensity ground operations. Hartman is a 7th Aircraft Maintenance Squadron crew chief.