Zack Jamison, a contracted construction laborer, uses a jack hammer to loosen up concrete slabs during construction and renovation of a smoke house at Grissom Air Reserve Base, Ind., June 22, 2015. Grissom's new state of the art smoke house will help provide firefighters with mandated training requirements. (U.S. Air Force photo/Senior Airman Jami K. Lancette)
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