ATLANTIC OCEAN (May 20, 2021) Boatswain’s Mate 2nd Class Calvin Goon, left, gives training to Seaman Martez Warren during a replenishment-at-sea aboard the Arleigh Burke-class guided-missile destroyer USS Roosevelt (DDG 80), May 20, 2021. Roosevelt is participating in 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 Andrea Rumple)