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Relatives of victims of the 9/11 attacks on the World Trade Center arrive at Ground Zero during the eighth anniversary commemoration ceremony in New York, September 11, 2009 (Credit: Reuters/Peter Foley)

Relatives of victims of the 9/11 attacks on the World Trade Center arrive at Ground Zero during the eighth anniversary commemoration ceremony in New York, September 11, 2009 (Credit: Reuters/Peter Foley)