Airman 1st Class Devin Fate, 48th Aircraft Maintenance Squadron crew chief, Royal Air Force Lakenheath, England, kneels on the flightline during final checks of an F-15E Strike Eagle before takeoff at Nellis Air Force Base, Sept. 9, 2016. Green Flag is a close air support and joint integration exercise administered by the U.S. Air Force Air Warfare Center and Nellis AFB through the 549th Combat Training Squadron. (U.S. Air Force photo by Airman 1st Class Kevin Tanenbaum/Released)