With a year to go before it even touches the water, the Navy's amphibious assault ship, USS New York, has already made history. It was built with 24 tons of scrap steel from the World Trade Center. It is the fifth in a new class of warship — designed for missions that include special operations against terrorists. It will carry a crew of 360 sailors and 700 combat-ready Marines to be delivered ashore by helicopters and assault craft. Steel from the World Trade Center was melted down in a foundry in Amite, La., to cast the ship's bow section.