It is the tenth anniversary of the terrorist attacks on the World Trade Center on September 11, 2001. A day that many will never forget where they were when they heard and saw these horrible events unfold. 3,000 people were killed and thousands injured in the attacks coordinated by the al-Qaeda terrorist group. Here are six things you may not know about 9/11.

  • 6

    20 people were pulled out alive from the rubble of the World Trade Center

    That included two policemen who were buried for close to 21 hours, and a woman from the 64th floor of one tower who was buried for 27 hours.

    U.S. Navy Photo by Jim Watson/Getty Images
    U.S. Navy Photo by Jim Watson/Getty Images
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  • 5

    The British lost the second highest number of people

    More than 80 nationalities lost at least one life that day. 372 non-Americans were murdered, including 67 British nationals.

    Photo by Christopher Furlong/Getty Images
    Photo by Christopher Furlong/Getty Images
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  • 4

    The fire lasted for 99 days

    The World Trade Center fire wasn't extinguished completely until December 19th – a full 99 days after the attacks.

    Photo by Mario Tama/Getty Images
    Photo by Mario Tama/Getty Images
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  • 3

    A third skyscraper fell

    A 47-story building, World Trade Center Building 7, ALSO fell – late in the afternoon on 9/11. It wasn't hit by a plane – the fires and collapse of the other towers made it fall.

    Photo by Jose Jimenez/Primera Hora/Getty Images
    Photo by Jose Jimenez/Primera Hora/Getty Images
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  • 2

    One company lost two-thirds of its employees

    A financial services firm called Cantor Fitzgerald saw 658 of its 960 employees die on 9/11. Ten years later, the firm has donated more than $180 MILLION to those employees' families.

    Photo by Chris Hondros/Getty Images
    Photo by Chris Hondros/Getty Images
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  • 1

    The steel from the WTC was sold

    About 185,101 tons of steel were left in the aftermath of the World Trade Center. Much of it has been sold to China and India – the rest has been used for memorials.

    Photo by Chris Hondros/Getty Images
    Photo by Chris Hondros/Getty Images
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