An F-16 Fighting Falcon, from the Alabama Air National Guard, participates in a training sortie during the Green Flag-West 13-2 exercise Nov. 4, 2012, over Nevada. A typical Green Flag exercise involves two multi-role fighter and/or bomber squadrons, unmanned aircraft, electronic warfare aircraft and aerial refueling aircraft. (U.S. Air Force photo/Staff Sgt. Christopher Hubenthal)