Trench Rescue at Guardian Response 17
An Army Reserve Soldier from the 468th Fire Fighting Detachment ensures the side walls are braced properly down inside a trench in order to rescue and extract a mannequin during Guardian Response 17 at Muscatatuck Urban Training Center, Indiana on May 7, 2017. Nearly 5,000 Soldiers and Airmen from across the country are participating in Guardian Response 17, a multi-component training exercise to validate the military's ability to support Civil Authorities in the event of a Chemical, Biological, Radiological, and Nuclear (CBRN) catastrophe. (U.S. Army Reserve photo by Staff Sgt. Christopher Sofia/Released)