At Ground Zero: The 9/11 anniversary

Associated Press
The Tribute in Light, left, shines above a reflecting pool at the National September 11 Memorial, Tuesday, Sept. 11, 2012 in New York. Today marks the 11th anniversary of the terrorist attacks of Sept. 11, 2001. (AP Photo/Mark Lennihan)

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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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