Air Force Col. John Klein (right), the commanding officer of the 60th Air Mobility Wing, and Senior Airman Alexander Valks, 660th Aircraft Maintenance Squadron, participate in a chemical, biological, radiological and nuclear defense survival skills training course on Travis Air Force Base, Calif., Sep. 21, 2017. 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. ( Air Force photo by Heide Couch)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: -ru983, 60amw, afb, air, couch, force, heide, pa, photo, travis, usaf