Staff Sgt. Debra Erickson, with the 147th Human Resources Company, of the Minnesota National Guard, dons a M50 gas mask during Combat Combat Support Training Exercise (CSTX) at Fort McCoy, Wisconsin, , 2021. CSTX prepares Soldiers to operate in an austere combat environment while maintaining a high level of operational readiness.

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Photo credit: © Operation 2021 / Alamy / Afripics
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