One WTC becomes tallest building in Western Hemisphere as spire is attached at 1,776 feet

Matt Lauer tweets that the spire atop One WTC was finished and bolted down this morning.

Construction workers bolted a 408-foot spire into place atop One World Trade Center on Friday, symbolically capping New York's comeback after the September 11, 2001, terror attacks.

The spire brings the iconic building to a height of 1,776 feet -- an allusion to the year the United States declared its independence. It also makes the building the tallest in the Western Hemisphere and the third-tallest in the world.

The company developing the building in partnership with the Port Authority of New York & New Jersey confirmed the installation.

While the building still has significant construction before its scheduled 2014 opening, the installation brought cheers from New Yorkers, and from people around the country.