The USS New York, named to commemorate the Sept. 11, 2001, terrorist attacks, left the Northrop Grumman shipyard where it was built for the trip to its namesake city. The $1 billion ship will be formally commissioned in New York in early November.

The New York is 684 feet long and can carry up to 800 Marines. It has a flight deck that can handle helicopters and the MV-22 Osprey tilt-rotor aircraft.

Four tugboats performed an intricate set of maneuvers to pull the warship from the dock at the New Orleans-area shipyard and turn it 180 degrees toward the waters of Gulf of Mexico. An armed Coast Guard speedboat and a helicopter flying overhead guarded the vessel. The ship will sail through the Gulf and around Florida before turning north and continuing to New York.

Deputy project manager Doug Lounsberry said the vessel was important to the builders, not only because it honors those killed in the terrorist attacks, but because workers were hit by Hurricane Katrina in 2005 during the early phases of construction.

"It's like raising a kid," Lounsberry said. "We're sending this one off to college. But after they leave, they remain near and dear to your heart."

Farther down the Mississippi, hundreds of people lined up along the river bank to watch the ship pass. Around 9:45 a.m., a man called "Here she comes!" prompting well-wishers to raise U.S. flags and camera phones, as the hulking warship emerged from the haze.

When terrorist hijackers crashed two jetliners into the World Trade Center on Sept. 11, 2001, destroying the twin towers and killing nearly 2,800 people, the ship was already on the drawing board. In September 2002, the Defense Department announced the selection of New York as the ship's name, honoring the city and state and those who died in the attacks.

About 7.5 tons of World Trade Center steel was melted at the Bradken Inc. foundry in Amite, Louisiana, and used in the New York's bow.

The New York revives a name held by at least four other U.S. Navy ships, including a Spanish-American War-era cruiser, a battleship that served in World Wars I and II and a nuclear submarine retired from the fleet in 1997.

Enlarge By Patrick Semansky, AP Geri Cavaretta of Madisonville, La., listens to the National Anthem before watching the USS New York sail down the Mississippi River in New Orleans on Tuesday. The ship was built with about eight tons of steel from the World Trade Center site and is on its way to New York, its home port.

		Onlookers wave flags as the USS New York sails through heavy fog on the Mississippi River in New Orleans on Tuesday. The ship was built with about eight tons of steel from the World Trade Center site and is on its way to New York. By Patrick Semansky, AP