ATLANTIC OCEAN (May 13, 2021) The Arleigh Burke-class guided-missile destroyer USS Paul Ignatius (DDG 117) transits the Atlantic Ocean, May 13, 2021. Paul Ignatius will participate in exercise At-Sea Demo/Formidable Shield, which is a joint live-fire integrated air and missile defense (IAMD) exercise conducted by Naval Striking and Support Forces NATO on behalf of U.S. Sixth Fleet. (U.S. Navy photo by Mass Communication Specialist 2nd Class Nathan T. Beard)