U.S. Air Force Senior Airman Collin Barnett (center), assigned to the 379th Readiness and Emergency Management Flight, instructs Airmen how to remove contaminated gear during a joint chemical hazard training exercise at Al Udeid Air Base, Qatar, Nov. 25, 2017. The 379th Explosive Ordnance Disposal Flight, 379th Bioenvironmental Engineering Flight and 379 CEX Flight responded to a simulated chemical agent threat from an improvised rocket-assisted mortar. The exercise concluded with training on establishing a contamination control area. (U.S. Air National Guard photo by Staff Sgt. Patrick Evenson)