Tears stream down Sgt. Christopher Patterson’s face after exiting the gas chamber. Patterson, a human resources specialist assigned to the 90th Human Resources Company, 3rd Special Troops Battalion, 3rd Infantry Division Sustainment Brigade on Fort Stewart, underwent the company’s annual M50 Mask Confidence training Oct. 4. The purpose of the training was to put Soldiers in a stressful environment and check their efficiency with their gas masks in the case of a chemical attack. ( Army photo by Spc. Elizabeth White with the 3rd Sustainment Brigade/Released)

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