U.S. Air Force Airman 1st Class Andrew Villagran, a 319th Civil Engineer Squadron emergency management journeyman, briefs Airmen during readiness training on Grand Forks Air Force Base, N.D., Feb. 26, 2018. Villagran spoke about post attack reconnaissance actions and how to check equipment for contamination after a potential chemical attack. (U.S. Air Force photo by Airman 1st Class Melody Wolff)
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