BRITISH ISLES (May 24, 2021) The Arleigh Burke-class guided-missile destroyer USS Paul Ignatius (DDG 117) conducts a full power run while transiting the Atlantic Ocean during exercise At-Sea Demo/Formidable Shield, May 24, 2021. Exercise At-Sea Demo/Formidable Shield, conducted by Naval Striking and Support Forces NATO on behalf of U.S. Sixth Fleet, is a live-fire integrated air and missile defense (IAMD) exercise that improves Allied interoperability using NATO command and control reporting structures. (U.S. Navy photo by Mass Communication Specialist 2nd Class Nathan T. Beard)