|U.S. Air Force Staff Sgt. Tony Simper prepares to spur gear the drum exit unit of an F-16 Fighting Falcon aircraft gun system at Aviano Air Base, Italy, Feb. 6, 2007.|
Simper is an aircraft armament system journeyman with the 31st Maintenance Squadron.
U.S. Air Force photo by
Airman 1st Class Liliana Moreno