500th F-35 pilot takes to the sky
An Air Force F-35 Lighting II student pilot climbs into an F-35 at Luke Air Force Base, Ariz., July 7, 2017. Since F-35 pilot training began in 2011, the Air Force has trained and graduated 500 pilots across the joint and international enterprise. (U.S. Air Force photo by Staff Sgt. Jensen Stidham)