Staff Sgt. Keith Diamond, 434th Maintenance Squadron structural maintenance technician, left, tightens the hood of Master Sgt. Kathy Castleberry, 434th Maintenance Group scheduler, during chemical, biological, radiological and nuclear defense [CBRNE] training at Grissom Air Reserve Base, Ind. Oct. 14, 2017. The hands-on CBRNE training served both as a refresher for the experienced or was the first time many Airmen had received hands-on training on ATSO, or the ability to survive and operate in wartime conditions. ( Air Force

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