Staff Sgt. Gerald Estelle, 122nd Weapons Load shop, 122nd Fighter Wing, Fort Wayne, Ind., moves quickly to don his gas mask as an alarm sounds during a base wide exercise, May 13, 2016, at the Indiana Air National Guard Base, Fort Wayne, Ind. Airmen were training to operate while in Mission Oriented Protective Posture gear, used during chemical, biological, radiological or nuclear attacks. ( Air National Guard photo by Staff Sgt. William Hopper)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

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