SS United States is a luxury passenger liner built in 1952 for United States Lines.She was designed by American naval architect William Francis Gibbs to capture the trans-atlantic speed record. She is the largest ocean liner constructed in the US and the fastest ocean liner to cross the Atlantic for which she still holds the Blue Riband. She was withdrawn from service in 1969 and  has since been docked at Pier 82 on the Delaware River in Philadelphia.