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BOSTON (May 18, 2018) Fireman Gabriel Lupo, assigned to USS Constitution, climbs the ship’s mizzenmast during ‘Old Ironsides' underway commemorating the Vietnam War. In coordination with the United States of America Vietnam War Commemoration, the crew of USS Constitution hosted Vietnam veterans onboard as a thank you for their years of service and sacrifice for their country. (MC3 Casey Scoular/Navy)