F-15E Strike Eagles from the 492nd Fighter Squadron are parked in preparation for exercise Red Flag 16-4 at Nellis Air Force Base, Nevada, Aug 13. Red Flag is the U.S. Air Force’s premier air-to-air combat training exercise and one of a series of advanced training programs that is administered by the U.S. Air Force Warfare Center and executed through the 414th Combat Training Squadron. (U.S. Air Force photo/ Tech. Sgt. Matthew Plew)