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 involves a series of intense air-to-air combat exercises designed to prepare U.S. and allied forces for future real world conflicts. (U.S. Air Force photo by Senior Airman Joshua Kleinholz)