180418-A-LI523-756 U.S. Army Soldiers with the 2-501st General Support Aviation Battalion (GSAB), 1st Armored Division, based in Ft. Bliss, Texas, conduct pre-flight checks on their HH-60M MEDEVAC Blackhawk during Guardian Response 18 at Camp Atterbury, Ind., April 18, 2018. More than 4,500 Soldiers from across the country are participating in Guardian Response 18, a multi-component training exercise to validate U.S. Army 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 Reserve photo by Staff Sgt. Christopher J. Sofia, 78th Training Division) SHARE: Download: Full Size (2.07 MB) Tags: radiological, Indiana, CBRN, Chemical, U.S. Army, U.S. Army Forces Command, FORSCOM, Biological, Muscatatuck Urban Training Center, MUTC, USAR, combat support training program, army total force, Nuclear, America’s Army Reserve, CSTP, Guardian Response, U.S. Army Reserve, 84th Training Command, 78th Training Division, Guardian Response18, Vinrant Response Credit: Staff Sgt. Christopher Sofia VIRIN: 180418-A-LI523-756.JPG Photo Gallery