caption: Tech Sgt. <PERSON>, 23d Maintenance Squadron assistant NCO in charge of aircraft metals technology, tightens his boots, Feb. 1, 2018, at Moody Air Force Base, Ga. Airmen participated in a chemical, biological, radiological and nuclear defense (CBRNE) class to better prepare them to combat enemy attacks while also familiarizing them with mission-oriented protective posture (MOPP) gear. (Air Force photo by <PERSON>)
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