U.S. Army Reserve Soldiers receive mock casualties at a decontamination zone following a simulated nuclear attack during Guardian Response 22 at Muscatatuck Urban Training Center, Indiana, May 2, 2022. Army Reserve Soldiers with the 491st Medical Command Area Support from Santa Fe, New Mexico, and the 307th Chemical Company from Bell, California, participated in Guardian Response 22 this year. Guardian Response 22 is a homeland emergency response exercise that provides realistic disaster response training to sharpen the skills and increase the capabilities of Army Reserve Soldiers. (U.S. Army photo by Spc. Justin Escourse)