In honor of the twelfth anniversary of the Sept. 11 attacks, Earth Cam has pieced together a time-lapse video showing the progress of One World Trade Center in New York City.
The video features striking footage from October 2004 to September 2013, and captures the completion of the tower, including the addition of the spire last May.
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One World Trade Center is the tallest building in the western hemisphere at 1,776 feet.