Air Force Master Sgt. Lee Boston, 621st Contingency Response Wing contingency location team lead, holds a security position during an Agile Combat Employment training for Mobility Guardian 2021 at Alpena Combat Readiness Training Center, Michigan, May 25, 2021. The challenging exercise simulates combat against a highly capable adversary in a contested, degraded and operationally limited environment based on anticipated future threats.

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Photo credit: © Operation 2021 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 2021, ace, amc, guardian, mg21, mobility