Chief Master Sgt. Richard Scully, 434th Maintenance Group quality assurance chief, tightens a gas mask on Staff Sgt. Danielle White, 434th Aircraft Maintenance Squadron avionics technician during chemical, biological, radiological and nuclear defense [CBRNE] training at Grissom Air Reserve Base, Ind. Oct. 14, 2017. Over 200 Airmen received hands-on CBRNE training, as part of a new directive from the Department of Defense that requires certain UTCs to receive training every 18 months. ( Air Force photo/Staff Sgt. Katrina Heikkinen)

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Photo credit: © Military Collection / Alamy / Afripics
License: Licensed
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