Red Flag 17-4
Airman Juan Luna, a crew chief with the 94th Aircraft Maintenance Unit, reviews technical orders while preparing to launch an F-22 Raptor during Red Flag 17-4, August 14, 2017, at Nellis AFB, Nev. Red Flag is a realistic combat training exercise involving the air, space and cyber forces of the United States and its allies. (U.S. Air Force photo/Staff Sgt. Carlin Leslie)