A United Kingdom F-35B Lightning II flies alongside a Navy F-35C, a Marine Corps F-35B, and an Air Force F-35A from the 33rd Fighter Wing in the skies above Eglin Air Force Base, Fla. May 21. The F-35s at Eglin AFB surpassed 5,000 combined training sorties May 28, contributing more than a third of all sorties in the Department of Defense program. The 33rd FW F-35 Integrated Training Center trains F-35 A/B/C Lightning II pilots, maintainers, air battle managers and intelligence personnel for the Marine Corps, the Navy, the Air Force and, in the future, at least eight international partners. (U.S. Air Force photo/Staff Sgt. Katerina Slivinske)