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22nd Marine Expeditionary Unit force reconnaissance platoon Marines flash bang enemy role players as they clear a live-fire house during close quarters combat training at Tier 1 Group in Crawfordsville, Ark., June 30, 2013. The Marines completed more than 200 hours of advanced pistol, rifle, sniper, tactical driving, breaching and close quarters combat training throughout the 18-day course. (Marine Corps photo by Sgt. Austin Hazard/released) - 22nd Marine Expeditionary Unit force reconnaissance platoon Marines flash bang enemy role players as they clear a live-fire house during close quarters combat training at Tier 1 Group in Crawfordsville, Ark., June 30, 2013. The Marines completed more than 200 hours of advanced pistol, rifle, sniper, tactical driving, breaching and close quarters combat training throughout the 18-day course. (Marine Corps photo by Sgt. Austin Hazard/released)
Company B, 2nd Reconnaissance Battalion Marines throw a flash into the entrance of a training facility before entering and clearing it during live-fire training at Marine Corps Base Camp Lejeune, N.C., April 19, 2013. More than 120 Marines completed the two-week training, which included close-quarters tactics and flash bang procedures. (Marine Corps photo by Sgt. Austin Hazard/Released) - Company B, 2nd Reconnaissance Battalion Marines throw a flash into the entrance of a training facility before entering and clearing it during live-fire training at Marine Corps Base Camp Lejeune, N.C., April 19, 2013. More than 120 Marines completed the two-week training, which included close-quarters tactics and flash bang procedures. (Marine Corps photo by Sgt. Austin Hazard/Released)