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Airmen collect expended brass shell casings after firing an M-4 Carbine at the Combat Arms Training Range July 9, 2013, Eielson Air Force Base, Alaska. Prior to shooting live ammunition Airmen practice on a virtual range called an engagement skills trainer saving money on live ammunition prior to setting foot on a live-fire range. (U.S. Air Force photo by Senior Airman Shawn Nickel/Released)
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