181107-F-HJ760-3140
U.S. Air Force Tech. Sgt. Samuel Helfrich, the 354th Civil Engineer Squadron noncommissioned officer in charge of emergency management, performs a demonstration for all Airmen participating in Arctic Gold 19-2, Nov. 7, 2018, at Eielson Air Force Base, Alaska. Mission-oriented protective posture is protective gear used by U.S. military personnel in a toxic environment during a chemical, biological, radiological or nuclear strike. (U.S. Air Force photo by Airman Aaron Guerrisky)