A time-lapse video charting the construction of the building that replaced the World Trade Center towers has been released – as the US marks 12 years since the 9/11 attacks.
It shows the construction of the tower, called One World Trader Center, from 2004 to 2013.
The video was produced by webcam operator EarthCam.
In May the skyscraper’s spire was added, making it, at 541-metres, the tallest building in the Western hemispere.
It comes as thousands gathered this week at Ground Zero in New York to mark the anniversary.
A new documentary has also been released.
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