One World Trade Center seen from the sky
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One World Trade Center opens for business in New York

More than 13 years after the original towers were destroyed in the 9/11 attacks, New York's World Trade Center has re-opened for business.

Employees at publishing giant Conde Nast are starting to move into the 104-storey One World Trade Center.

The $3.8bn (£2.4bn) skyscraper took eight years to build and is now the tallest building in the US.

It is at the centre of the site, which includes a memorial in the footprints of the old towers and a museum, which opened this year.

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