U.S. Air Force Senior Airman Tanner Hart, of the 219th Security Forces Squadron, opens the door to a High Mobility Multipurpose Wheeled Vehicle (HMMWV), commonly known as a Humvee, as he prepares to leave a missile alert facility 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)