U.S. Army Sgt. Roderick Nool, 66th Military Police Company out of Joint Base Lewis-McChord, Tacoma, Wa., notionally disinfects a role-player as part of a decontamination line exercise during Guardian Response 22, May 8, 2022 at Muscatatuck Urban Training Center, Ind. Guardian Response 22 is an annual homeland emergency response exercise designed to sharpen skills, boost capabilities and improve mission readiness of the units assigned to the Department of Defense’s CBRN Response Enterprise. (U.S. Army photo by Sgt. Matthew Roberts)