Airman 1st Class Benjamin Hill, 4th Aircraft Maintenance Squadron, performs preflight checks for his 4th Fighter Wing F-15E Strike Eagle as an F-35A Lighting II lifts off Nov. 8 at Eglin Air Force Base, Fla. The F-15s from Seymour Johnson AFB were at Eglin for the air-to-ground weapons system evaluation program known as Combat Hammer. The program is managed by the 86th Fighter Weapons Squadron, part of the 53rd Wing, headquartered at Eglin. (U.S. Air Force photo/Samuel King Jr.)