The Arleigh Burke-class guided-missile destroyer USS Paul Ignatius (DDG 117) fires a MK-45 MOD 4 5-inch 62 caliber lightweight gun as part of a live-fire exercise during exercise At-Sea DemoFormidable Shield, June 01, 2021. br br Exercise At-Sea DemoFormidable 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. ( #USNavy photo by Mass Communication Specialist 2nd Class Nathan T. BeardReleased)br br "The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement.