Senior Airman Roger Stitt, Defensive Avionics Technician assigned to the 28th Aircraft Maintenance Squadron, performs pre-flight checks on a B-1 bomber prior to a Red Flag 16-2 training sortie at Nellis Air Force Base, Nev., March 3, 2016. Red Flag provides realistic combat training in a contested, degraded and operationally-limited environment, which provides aircrews with real-time war scenarios and helps ground crews test and improve their operational readiness. (U.S. Air Force photo by Senior Airman Joshua Kleinholz)