ready to lock and load
Staff Sgt. Randall Thompson, 4th Equipment Maintenance Squadron armament technician, cleans an F-15E M61A1 20mm Gatling gun barrel at Seymour Johnson Air Force Base, N.C., July 24, 2009. The F-15E can carry 510 rounds for the M61A1, which can be exhausted in five seconds firing 4,000 to 6,000 rounds per minute. (U.S. Air Force photo by Airman 1st Class Gino Reyes)