U.S. Air Force Senior Airman Luke Bryant and Staff Sgt. Oscar Morales, both explosive ordnance disposal technicians assigned to the 379th Expeditionary Civil Engineer Squadron, fill sand bags during a joint chemical threat training exercise at Al Udeid Air Base, Qatar, Nov. 25, 2017. The 379th EOD Flight, 379th Bioenvironmental Engineering Flight and 379th Readiness and Emergency Management Flight responded to a simulated chemical agent threat. The sandbags were used to secure munitions while they were being assessed by EOD technicians. (U.S. Air National Guard photo by Staff Sgt. Patrick Evenson)