BOSTON (CBS) – The U.S.S. Constitution fired off a 21-gun salute by Castle Island on Friday to commemorate the 75th anniversary of D-Day.

The event involving both soldiers and sailors served to highlight the long relationship between the United States Army and Navy.

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The cannon firing happened just off Fort Independence on Castle Island, and the 101st Field Artillery Regiment of the Massachusetts National Guard returned the salute.

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The USS Constitution fires off a 21-gun salute to commemorate the 75th anniversary of D-Day (WBZ-TV)

There was also a 17-gun salute when Old Ironsides passed by the U.S. Coast Guard Sector Boston.

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The world’s oldest commissioned warship will reopen for tours on Friday from 3 p.m. to 6 p.m. and resume normal hours Saturday morning at 10 a.m.