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Grenades detonated as part of Security Forces training
114th Security Forces Squadron members deploy ground burst simulators during training at a range near Joe Foss Field, S.D. Feb. 3, 2018. Ground burst simulators are used in the training environment to better prepare members for real world scenarios and to help evaluate proper reactionary measures. (U.S. Air National Guard photo by Staff Sgt. Duane Duimstra)

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