July 4, 2018 12:01 pm USS Constitution Fires 21-Gun Salute Off Castle Island The USS Constitution, the world’s oldest commissioned warship still afloat, made its traditional Fourth of July trip to Castle Island where it fired a 21-gun salute. US & World Videos 2:08 Jennifer Lopez stuns at first red carpet after Ben Affleck split 0:58 Rare 1787 copy of US Constitution is up for auction and it could be worth millions 0:52 What is the Guardian Cap on football helmets? 6:20 Paris Hilton reveals son Phoenix is saying her and Nicole Richie's iconic catchphrase 2:48 Drew Barrymore, Demi Lovato and more child star revelations