BY THE NUMBERS

19: Highjackers identified and linked to Osama bin Laden three days after the attack.

585: Number of pages in the federal 9/11 Commission’s final report.

20: The number of months the commission investigated the attacks.

530 miles per hour: The speed American Flight 77 was going when it hit the Pentagon

93 through 99: The floors of the north tower into which American Flight 11 flew

Source: The 9/11 Commission Report, Time, The Associated Press, september11victims.com