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Airman 1st Class Joshua Pearce, 56th Civil Engineer Squadron firefighter, takes a break during the ability to survive and operate training Aug. 13 to get a drink from his canteen. Airman Pearce's gas mask is fitted with a special tube that allows Airmen to safely drink water from their canteens even in a chemical environment. The base-wide exercise was to prepare Thunderbolts for deployment readiness. (Photo by Tech. Sgt. Jeffrey Wolfe)