A U.S. Air Force F-15C Eagle assigned to the 144th Fighter Wing, Fresno Air National Guard Base, Calif., taxis on the Nellis Air Force Base, Nev. runway, Feb. 2, 2016, as part of Red Flag 16-1. Red Flag is a realistic combat training exercise which involves air, space and cyber forces from the U.S. and its allies. (U.S. Air National Guard photo by Senior Airman Klynne Pearl Serrano)