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A member of the 521st Contingency Response Squadron mans an HMMWV-mounted heavy machine gun during exercise PACIFIC DAGGER Feb. 6, 2025, at Westover Air Reserve Base, Mass. The 621st Contingency Response Wing designed the exercise to test the unit’s airfield-opening mission, adding cold weather as an additional challenge. (U.S. photo by Master Sgt. Tristan McIntire)