U.S. Air Force Airman 1st Class Hallie Dickens, 325th Civil Engineer Squadron emergency manager, describes the contents of a PowerPoint slide during a Chemical, Biological, Radiological and Nuclear defense class at Tyndall Air Force Base, Florida, Oct. 28, 2021. CBRN classes are mandatory before deployments, as Airmen can often deploy to unstable environments and need to know how to properly respond during CBRN warfare. (U.S. Air Force photo by Airman 1st Class Tiffany Price)
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