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Airman Marcus Gray, 51st Civil Engineer Squadron firefighter, dons his gas mask before responding to a simulated building fire during exercise Beverly Herd 17-3 at Osan Air Base, Republic of Korea September 20, 2017. The exercise was held to evaluate how well base units provided emergency support while defending assets and personnel in a hostile chemical, biological, radiological and nuclear environment. (U.S. Air Force photo by Tech Sgt. Ashley Tyler)


Beverly Herd 17-3: Building Fire

Airman Marcus Gray, 51st Civil Engineer Squadron firefighter, dons his gas mask before responding to a simulated building fire during exercise Beverly Herd 17-3 at Osan Air Base, Republic of Korea September 20, 2017. The exercise was held to evaluate how well base units provided emergency support while defending assets and personnel in a hostile chemical, biological, radiological and nuclear environment. (U.S. Air Force photo by Tech Sgt. Ashley Tyler)

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