Senior Airmen Phillip Steffen, Dustin Fullerton and Eric Griffin, 434th Civil Engineer Squadron structural journeymen, complete work on a new observation tower overlooking the M203 grenade launcher range at Grissom Air Reserve Base, Ind., May 5, 2013. The tower allows 434th Security Force Squadron instructors to watch over and observe their Airmen training on the range. (U.S Air Force photo/Staff Sgt. Andrew McLaughlin)
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