Spire installed on WTC tower

Workers prepare to raise the silver spire atop the One World Trade Center building in New York. The 408-foot spire will serve as a world-class broadcast antenna. An LED-powered light emanating from it will be seen from miles away. When it is installed, it will bring the iconic structure to its full, symbolic height of 1,776 feet. (Mark Lennihan / Associated Press)

May 10, 2013 7:44 AM PT

The silver spire topping New York City’s One World Trade Center has been installed on the building’s roof.

One World Trade Center stands at its full height above the New York City skyline in this view from Jersey City, N.J. (Julio Cortez / Associated Press)