U.S. Air Force Staff Sgt. Shawn McElyea, with the 219th Security Forces Squadron, North Dakota Air National Guard, scans a sector during an exercise simulating the recapture of a missile launch facility at Minot Air Force Base, N.D., May 20, 2014. The scenario was part of annual training that prepared the Airmen for a real-world response. (U.S. Air National Guard photo by Senior Master Sgt. David H. Lipp/Released)