U.S. Air Force Staff Sgt. Norbert Dudzic, 325th Communications Squadron cable maintenance supervisor, checks the seal on a gas mask at Tyndall Air Force Base, Florida, Oct. 28, 2021. During Chemical, Biological, Radiological and Nuclear defense training, students are taught how to properly don gas masks and in what situations a gas mask might be necessary. (U.S. Air Force photo by Airman 1st Class Tiffany Price)
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