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Senior Airman Tanastacia Hill, 375th Civil Engineer Squadron emergency management technician instructs students how to properly wear a protective mask on Scott Air Force Base, Ill., Oct. 13, 2020. Protective masks ensure service members are able to breathe without complications in the events of a real-world Chemical, Biological, Radiological, Nuclear event. (U.S. Air Force photo by Airman 1st Class Shannon Moorehead)
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