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GULF OF CADIZ (Oct. 9, 2019) The guided-missile destroyer USS Gridley (DDG 101) fires its Mark 45 5-inch gun during a live-fire exercise as part of the NATO Maritime Command-led exercise Dynamic Mariner 2019. The NATO Maritime Command-led Dynamic Mariner/Flotex 19 (DYMR/FL19) is an exercise that tests NATO's Response Force Maritime Component and enhances the flexibility and interoperability amongst Allied nations. DYMR/FL19 involves ships, submarines, aircraft and personnel from fifteen Allied nations converging off the coast of Spain. (U.S. Navy photo by Mass Communication Specialist 2nd Class Cameron Stoner)