John H. Shelton with Chemical Biological Incident Force, CBIRF, was pinned to the rank of sergeant by his son during a promotion ceremony at Naval Support Facility at Indian Head, Md. Dec. 1, 2017. Shelton works as a chemical, biological, radiation, nuclear defense specialist for the Identification & Detection platoon at CBIRF. (Official USMC photo by Cpl. Maverick Mejia)

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Keywords: cbirf, promotions