At Ground Zero: The 9/11 anniversary

Associated Press
FILE - In this Oct. 27, 2012 file photo, Photographs of  the two children allegedly stabbed by their nanny are displayed alongside balloons and stuffed animals at  memorial outside the apartment building were they lived in New York.  Yoselyn Ortega, the nanny, has pleaded not guilty in the stabbing deaths of the two children. Ortega was arraigned Wednesday, Nov. 28, 2012 at a hospital where she has been treated for self-inflicted stab wounds.  Six-year-old Lucia Krim and her 2-year-old brother, Leo, were killed Oct. 25 in their Upper West Side apartment. Their mother found them when she came home with the victims' 3-year-old sister.  (AP Photo/Mary Altaffer)

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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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