COPENHAGEN, Denmark (March 21, 2022) Cmdr. James Diefenderfer, left, commanding officer of the Arleigh Burke-class guided-missile destroyer USS The Sullivans (DDG 68), stands with the bridge crew as the ship pulls into port in Copenhagen, Denmark, March 21, 2022. The Sullivans is operating in the European theater of operations and participating in a range of maritime activities in support of U.S. 6th Fleet and NATO Allies. (U.S. Navy photo by Mass Communication Specialist 3rd Class Mark Klimenko)