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SOUTH CHINA SEA (July 4, 2018) Sailors assigned to the Arleigh Burke-class guided-missile destroyer USS Mustin (DDG 89) fire illumination rounds and 40mm grenades using an M203 grenade launcher. Mustin is forward-deployed to the U.S. 7th Fleet area of operations in support of security and stability in the Indo-Pacific region. (U.S. Navy photo by Mass Communication Specialist 2nd Class Sonja Wickard/Released)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/127906254@N06">National Museum of the U.S. Navy</a>
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