Airmen with the 841st Missile Security Forces Squadron run through protocol to enter a room during training June 14, 2018, at Malmstrom Air Force Base, Mont. Throughout training, Airmen use simunitions, or non-lethal training ammunition, to build and hone their current skills as a nuclear cop and security defender. (U.S. Air Force photo by Airman 1st Class Tristan Truesdell)