Workers have fully installed the spire atop One World Trade Center on Friday morning, bringing it to a symbolic 1,776 feet and making it the tallest building in the Western Hemisphere.
The 408-foot spire will serve as a world-class broadcast antenna. The LED-powered light emanating from it will be seen from miles away, the Associated Press reports.
Weighing 758 tons, the spire was raised to the roof of the building last week covered in an American flag.
The tower is located at the northwest corner of the site where the twin towers were destroyed on Sept. 11, 2001. The 72-story Four World Trade Center and other buildings are also on their way to being completed.
One World Trade Center is expected to open for business in 2014.