Master Sgt. Lee Boston, 321st Contingency Response Squadron contingency location team lead, secures a refueling area at Alpena Combat Readiness Training Center, Michigan, May 24, 2021, in support of Exercise Mobility Guardian 2021. Mobility Guardian tests Mobility Airmen through a challenging, realistic and detailed scenario based on relevant real-world security challenges.

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