U.S. Army Gen. Frank Grass, chief of the National Guard Bureau, left, shakes hands and congratulates Master Sgt. Luke Gardiner, of the 219th Security Forces Squadron, as Grass meets with members of the North Dakota Army and Air National Guard at a town Hall style briefing at the Raymond J. Bohn Armory, Bismarck, North Dakota, Dec. 12, 2015. (U.S. Air National Guard photo by Senior Master Sgt. David H Lipp/Released)