Dawn at the World Trade Center on Sept. 12, 2001.
Dawn at the World Trade Center on Sept. 12, 2001. Jim Macmillan / Philadelphia Daily News
Dawn at the World Trade Center on Sept. 12, 2001. Jim Macmillan / Philadelphia Daily News

National Security

September 11, 2007 6:00 AM

Would notebook's clues have headed off 9-11?

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