170518-N-PP996-001 PACIFIC OCEAN (May 18, 2017) The Arleigh Burke-class guided-missile destroyer USS Michael Murphy (DDG 112) fires its Mark 45 5-inch gun during a live-fire exercise in the western Pacific. The U.S. Navy has patrolled the Indo-Asia-Pacific routinely for more than 70 years promoting regional peace and security. (U.S. Navy photo by Mass Communication Specialist 3rd Class Danny Kelley/Released)