Air Force Senior Airman Patrick Garner, a 316th Security Forces Squadron SFS patrolman, fires a practice round out of a M203 grenade launcher at Marine Corps Base Quantico, Va., July 15, 2010. The 316th SFS combat arms instructors qualify base defenders and forward deploying members, as needed, on the M203 using 15 practice rounds that that fire up to 400 meters. Senior Airman Melissa V. Brownstein

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Keywords: .., air, andrews, base, defense, district, force, forces, joint, m203, military, quantico, security, united, virgina, war, washington