Posted: Apr 30, 2012 3:29 PM
Updated: Apr 30, 2012 3:30 PM
(NBC) - One World Trade Center is officially the tallest building in New York City.
Construction crews erected steel columns to form a girder that will eventually become the 100th
floor of the building on Monday.
The structure now stands a little more than 1,250 feet tall, topping the Empire State Building.
Upon completion one world trade will stand a symbolic 1,776 feet, becoming the tallest building in the United States and the second tallest in the world behind the Burj Khalifa Building in Dubai.
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