At Ground Zero: The 9/11 anniversary

Associated Press
FILE - In this April 17, 2012 file photo, One World Trade Center, rises above the lower New York City skyline as the National September 11 Memorial can be seen at lower right. More than a decade after 9/11, no one's quite sure what to call the spot that was once a smoldering graveyard but is now the site of the fast-rising, 1,776-foot skyscraper that will replace the twin towers. Some are calling the new skyscraper "One World Trade Center," but it's still "ground zero" to others. (AP Photo/Mark Lennihan, File)

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A look at the Ground Zero memorial ceremony and events throughout the day, commemorating the 10-year anniversary of the 9/11 terrorist attacks.

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