If you haven't seen it, you should read (or try to read, as I did) "102 Minutes" in the times today:
From their last words, a haunting chronicle of the final 102 minutes at the World Trade Center has emerged, built on scores of phone conversations and e-mail and voice messages. These accounts, along with the testimony of the handful of people who escaped, provide the first sweeping views from the floors directly hit by the airplanes and above.Collected by reporters for The New York Times, these last words give human form to an all but invisible strand of this stark, public catastrophe: the advancing destruction across the top 19 floors of the north tower and the top 33 of the south, where loss of life was most severe on Sept. 11. Of the 2,823 believed dead in the attack on New York, at least 1,946, or 69 percent, were killed on those upper floors, an analysis by The Times has found.