Sgt. Kristopher Franco, Pfc. Antonio Naranjo and Pvt. Raul Rodriguez from the 491st Medical Company Area Support, participate in simulated decontamination operations with mock casualties during Guardian Response 22 at Muscatatuck Urban Training Center, Indiana, May 2, 2022. The exercise validates U.S. Army Reserve units' ability to support the Defense Support of Civil Authorities (DSCA) in the event of a Chemical, Biological, Radiological and Nuclear (CBRN) catastrophe. (U.S. Army photo by Spc. Jacob Lockhart)