Police officers perform security checks to the general public who arrive at the ceremony marking the 10th anniversary of the Sept. 11 terrorist attacks on the World Trade Center, outside ground zero ... more 
Police officers perform security checks to the general public who arrive at the ceremony marking the 10th anniversary of the Sept. 11 terrorist attacks on the World Trade Center, outside ground zero in New York, Sunday, Sept. 11, 2011. (AP Photo/Oded Balilty) less 
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Associated Press | Photo By Oded Balilty
Sun, Sep 11, 2011 8:14 AM EDT