Spire permanently installed on NYC tower

The silver spire topping New York City's One World Trade Center has been fully installed on the building's roof. That brings the iconic structure to its full, symbolic height of 541 metres.
The Port Authority of New York and New Jersey says the spire's installation was completed this morning.
The 541 metres is symbolic of the year 1776, when the US declared its independence.
Pieces of the spire were transported to the roof of the building last week. It weighs 758 tons.
The 124.36-metre spire will serve as a world-class broadcast antenna. An LED-powered light emanating from it will be seen from miles away.

The new tower is at the northwest corner of the World Trade Center site, which is well on its way to reconstruction with the 72-story Four World Trade Center and other buildings.