Senior Airman Clark Kevin Santiago, 15th Wing financial manager, takes a test on chemical, biological, radiological and nuclear defense, during a CBRN exercise Sept. 14, 2022, at Joint Base Pearl Harbor-Hickam, Hawaii. The test covered various CBRN procedures, such as nerve agent identification and how to wear protective equipment. (U.S. Air Force photo by Staff Sgt. Jacob M. Thompson)
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