The world's tallest buildings

Published On: Mar 22 2012 12:13:22 PM EDT   Updated On: Nov 15 2013 01:57:54 AM EST

One World Trade Center in New York will now officially be the United States' tallest building when completed, beating out Chicago's Willis Tower. See how it stacks up to the world's tallest.

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Titoni Thomas via WikiMedia

Burj Khalifa, also known as Burj Dubai or Dubai Tower in the United Arab Emirates, is the tallest building in the world at 2,717 feet tall.

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