Airman 1st Class Benjamin Tanner, 741st Missile Security Forces Squadron tactical response force member, from Malmstrom Air Force Base, Mont., provides cover during a tactical response force training at Camp Guernsey, Wyo., July 19, 2017. Defenders move from position to position in the training while being covered by their comrades. (U.S. Air Force photo by Staff Sgt. Christopher Ruano)