Army 2nd Lt. Theresa Sulminski, assigned to 51st Chemical Company, 83rd Chemical Battalion, records emergency medical information for casualty evacuation at Muscatatuck Urban Training Center, Ind., in support of Guardian Response April 29, 2017. More than 4,100 service members from across the country are participating in the Army Reserve’s Exercise Guardian Response 17, a multi-component training exercise to validate Army units’ ability to support the Defense Support of Civil Authorities in the event of a Chemical, Biological, Radiological, and Nuclear catastrophe.

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