190513-N-VH871-170 ATLANTIC OCEAN (May 13, 2019) Fireman Christian Pangallo visually inspects a sample of F-76 onboard the Arleigh Burke-class guided-missile destroyer USS Roosevelt (DDG 80). Roosevelt is operating in the Atlantic Ocean in support of exercise Formidable Shield 19. Formidable Shield is designed to improve allied interoperability in a live-fire, integrated air and missile defense environment using NATO command and control reporting structures. (U.S. Navy photo by Mass Communication Specialist 2nd Class Austin Ingram/Released)