Located on the waterfront in historic Fall River, Massachusetts, Battleship Cove, a nonprofit maritime museum and war memorial, is home to the largest and most diverse collection of preserved US Navy ships in the world. It is the commonwealth's official memorial for the events of September 11, 2001, and the official veterans' memorial for World War II and the Korean, Vietnam, and Persian Gulf Wars. Beginning with the opening of the battleship USS Massachusetts in 1965, the "Fall River Navy" has continued to grow. The vessels include the submarine Lionfish, destroyer Joseph P. Kennedy Jr., and PT boats 617 and 796. Having hosted nearly six million visitors from all over the world, Battleship Cove is one of the most popular attractions in southeastern Massachusetts. It now stands at the threshold of a new era in its ambitions to modernize for the 21st century.