U.S. Air Force Airmen from the 1st Fighter Wing and 192nd Fighter Wing from Joint Base Langley-Eustis, Va. arrive at Nellis Air Force Base, Nev., to take part in Red Flag 17-4, Aug.10, 2017. Red Flag is a realistic combat training exercise involving the air, space and cyber forces of the United States and its allies that will run from August 14 to 25, 2017. (U.S. Air Force Photo/Staff Sgt. Carlin Leslie)