U.S. Air Force Airman 1st Class Andrew Dutton, a 509th Aircraft Maintenance Squadron crew chief, waits for pre-flight instructions over his headset at Whiteman Air Force Base, Mo., Feb. 2, 2016, during Red Flag (RF) 16-1. RF, located at Nellis AFB, Nev., enables joint and international units to sharpen their combat skills by flying simulated combat sorties in a realistic environment. (U.S. Air Force photo by Tech. Sgt. Miguel Lara III)