New York's ground zero through time

Published On: Aug 23 2011 04:09:26 AM CDT   Updated On: Nov 30 2014 01:26:35 PM CST

One World Trade Center is officially open for business. Take a look at the World Trade Center site through time, from the construction of the Twin Towers to the opening of the new centerpiece on the site.

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Police escort a civilian from the scene of the collapse of a tower of the World Trade Center Sept. 11, 2001, in New York City after two airplanes slammed into the twin towers in an alleged terrorist attack.

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