U.S. Air Force F-16 Fighting Falcon aircraft assigned to the 121st Fighter Squadron (FS), Joint Base Andrews, Md., and the 112th FS, Toledo Air National Guard Base, Ohio, stand by for launch May 4, 2015, during RED FLAG-Alaska (RF-A) 15-2 at Eielson Air Force Base, Alaska. (U.S. Air Force photo by Senior Airman Peter Reft/Released)