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170723-N-KV814-306 BOSTON (July 23, 2017) A tugboat works to remove a barrier used to secure USS Constitution inside Dry-dock One in the Charlestown Navy Yard. Over the past 26-months, Constitution has undergone an extensive restoration that will help to preserve America's Ship of State for many decades to come. (US Navy photo by Mass Communication Specialist 2nd Class Brandon Sierra/Released)
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