Air Force Senior Airman Bryan Macias, of the 163d Communications Flight, 163d Attack Wing, California Air National Guard, radios a report to a unit control center during CBRN Defense training, Jan. 11, 2020, at March Air Reserve Base, California. The biennial training helps ensure Airmen remain familiar with the protective equipment and procedures used during chemical biological nuclear and radiological attacks. ( Air National Guard photo by Staff Sgt. Crystal Housman)

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Photo credit: © Operation 2021 / Alamy / Afripics
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