An F-22 Raptor taxis toward the runway prior to flying a Red Flag 15-1 training mission Feb. 4, 2015, at Nellis Air Force Base, Nev. Night missions have been integrated into Red Flag to prepare aircrews for missions in low-light environments. The F-22 is assigned to the 94th Fighter Squadron at Joint Base Langley-Eustis, Va. (U.S. Air Force photo/Airman 1st Class Mikaley Towle)