Soldiers with the 561st Military Police Company based in Ft. Campbell, Ky discuss procedures of running a decontamination lane with the observer-controller trainers during Guardian Response 22 at the Muscatatuck Urban Training Center in Butlerville, Indiana May 7, 2022. The training is to prepare the unit when dealing with mass casualties during a nuclear detonation response in the local civilian population. (U.S. Army photo by Sgt. John W. Todd)