A U.S. Army UH-60 Black Hawk helicopter with Alpha Company, 5th Battalion, 101st Combat Aviation Brigade conducts an engine run-up in the falling snow of a winter storm at Bagram Airfield in the Parwan province of Afghanistan on Dec. 27, 2012.
DoD photo by Sgt. Duncan Brennan, U.S. Army.  (Released)
27 December 2012
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