An F-16 Fighting Falcon assigned to the 480th Fighter Squadron at Spangdahlem Air Base, Germany, flies during a Red Flag 15-3 sortie at Nellis Air Force Base, Nev., July 17, 2015. Red Flag is a realistic combat training exercise involving the air forces of the U.S. and its allies. (U.S. Air Force photo by Staff Sgt. Siuta B. Ika/Released)