In this Sept. 11, 2001, file photo, smoke billows from one of the towers of the World Trade Center and flames as debris explodes from the second tower in New York. Relatives of the victims of the Sept. 11 attacks called Thursday, Sept. 2, for the Justice Department's inspector general to investigate the FBI's failure to produce certain pieces of evidence from its investigation. (AP Photo/Chao Soi Cheong, File)
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