Air Force Staff Sgt. Joshua Aragon, 321st Contingency Response Squadron security team member, secures a refueling area at Alpena Combat Readiness Training Center, Michigan, May 24, 2021, in support of Exercise Mobility Guardian 2021. Mobility Guardian is Air Mobility Command’s largest and longest training event, preparing forces for the current and future fight.

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Keywords: 621st, ace, contingency, location, mg21, response, team, wing