From left to right, Maj. Dwight Harley, Maj. Mark Sheils, and Lt. Col. Lynette Arntson, all in the 119th Medical Group, perform cardiopulmonary resuscitation on a training mannequin during a North Dakota Air National Guard unit training assembly Jan. 9, Fargo, N.D.
Senior Master Sgt. David Lipp
Taken on 9 January 2011
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