U.S. Air Force Staff Sgt. Michael Arnold, of the 219th Security Forces Squadron, conducts a search of a launch facility during a training exercise in the Minot Air Force Base missile field complex, near Minot, N.D., June 15, 2017. He is a member of the North Dakota Air National Guard training and working seamlessly, side-by-side with U.S. Air Force active duty security forces members of the 91st Missile Wing as they maintain security standards in the missile fields. (U.S. Air National Guard Photo by Senior Master Sgt. David H. Lipp/Released)