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One World Trade Center Gets Spire, Bringing It To Its Full, Symbolic 1,776-Foot Height

Now that the 408-foot spire is atop One WTC, the building is the tallest in the United States. The 408-foot spire, weighing 758 tons, will serve as a world-class broadcast antenna. An LED-powered light emanating from it will be seen from miles away and a beacon will be at the top to ward off aircraft. It opens for business in 2014.