20mm load on an F-15
Technical Sgt. Terrance Brown, Technical Sgt. Scott Gemelli, and Staff Sgt. Ryan Quigley from the 104th Fighter Wing, Massachusetts Air National Guard unload rounds for the first time from the F-15 at Tyndall AFB, Florida as they participate in the Weapons System Evaluation Program (WSEP), known as Combat Archer, on April 19, 2011. This training is important for the ground crews to test their maintenance systems and processes while loading live munitions on the F-15 eagle, as well as critical live war fighting training for the F-15 pilots to employ air-to-air missiles against real world targets. (U.S.A.F. photograph by Senior Master Sgt. Robert J. Sabonis)