Marine Corps Capt. William C. Paffett, an air defense control officer with Marine Tactical Air Command Squadron 28, works in a tactical air control center during Ullr Shield on Fort McCoy, Wis., Jan. 22, 2018. Ullr Shield is a training exercise designed to improve 2nd Marine Aircraft Wing's capabilities in extreme cold weather environments. ( Marine Corps

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Keywords: 2d, america, armed, aviation, cold, defence, employee, federal, forces, fort, government, marines, maw, mccoy, military, operations, service, states, training, ullr, united, usa, weather, wisconsin