Airmen participate in a chemical, biological, radiological and nuclear defense survival skills training course on Nellis Air Force Base, Nev., April 30, 2015. The CBRN defense course consists of individual knowledge-based and demonstration performance objectives that provide an in-depth education on CBRN defense hazards and protective actions. Airman 1st Class Mikaley Towle)

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Photo credit: © PJF Military Collection / Alamy / Afripics
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Keywords: air, airforce, airman, cbrn, force, military, nellis, states, training, united, usa