Air Force Staff Sgt. Phillip Callahan, 19th Security Forces Squadron combat arms instructor, briefs Mobility Airmen prior to Force-on-Force training during Exercise Mobility Guardian 2021 at Alpena Combat Readiness Training Center, Alpena, Mich., May 22, 2021. Mobility Guardian invests in Mobility Airmen as the single greatest comparative advantage against an adversary.

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Keywords: 2021, amc, contingency, force, guardian, mg21, mobility, response