The SS United States, once the fastest transatlantic liner, has been deliberately sunk off Destin, Florida, to form the world’s largest artificial reef. The iconic ship’s final voyage ends a bygone era of luxury ocean travel. Al Jazeera’s Mike Hanna reports from Washington. #SSUnitedStates #OceanLiner #ArtificialReef #DestinFlorida #Florida #GulfOfMexico #MaritimeHistory #OceanTravel #AtlanticCrossing #BlueRiband #Shipwreck #MarineLife #ScubaDiving #AmericanHistory.