COPENHAGEN, Denmark (March 21, 2022) The Arleigh Burke-class guided-missile destroyer USS The Sullivans (DDG 68) 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)