Marines and Sailors transport vehicles on the Potomac during Capital Shield 19, at Indian Head, Md., Sep 5, 2019. Capital Shield is an exercise to train and prepare emergency responders in the National Capital Region for chemical exposure and response. ( Marine Corps photo by Lance Cpl. Sarah N. Petrock)

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Keywords: cbirf, chemical, commstrat, dc, mcbq, quantico, response, usmc