A massive structural beam from the
World Trade Center's south tower
was used in the ship's construction
A warship built with steel salvaged from the World Trade Center is set to arrive in New York.
The USS New York is due to sail up the Hudson River as far as Ground Zero, where it will fire a 21-gun salute.
It will be watched by relatives of those killed in the 2001 attacks that destroyed the buildings, along with rescuers and members of the public.
The US Navy is to hold an official commissioning ceremony for the new warship on Saturday.
The New York set off on its maiden voyage from Louisiana, where it was built, nearly three weeks ago.
The bow of the boat contains 7.5 tonnes of melted steel from the fallen buildings.
The ship's crest includes images of the Twin Towers and features the colours of the city departments that first responded to the terrorist attacks in which nearly 3,000 people died.
'A transformation'
The ship's 21-gun salute honouring those who died in the 11 September attacks is likely to trigger an emotional response among many in the city.
Rosaleen Tallon, whose firefighter brother was among those killed, said she would be watching the tribute and was pleased that the steel from the towers had been reused in the ship.
"It's a transformation of it from something really twisted and ugly," she told the Associated Press news agency. "I'm proud that our military is using that steel."
About one in seven of the 361 sailors serving on the ship are from New York state, a higher percentage than would normally be the case, a Navy spokeswoman told AP.
She said there had been many requests from Navy personnel to serve on the ship.
Story from BBC NEWS:
'Twin Towers' warship to enter NY
