(assuming this account is true)

From what I heard in early reports, the plane went up abruptly before the crash and then crashed immediately thereafter at high speeds at a 45 degree angle.
Today CNN confirmed that the passenger took a poll among the male passengers (85? total passengers on board) to try to overtake the hijackers after finding out that planes had already hit the WTC. They voted to try and thus gave their lives in a struggle. They apparently saved the White House or another hit to the Pentagon (or Camp David?). The plane was definately headed to the DC area.

All of this is unconfirmed but seems to be close to the truth.

These passengers may have saved thousands of lives. I salute them for their absolute courage in standing up to murderers, whether or not they were directly responsible for the crash in a field.

Things to ponder: The other 3 planes hit there targets. This one didn't.
All the planes had a relatively small number of passengers on board. Coincidence?
The weather on the day of the attack was clear so that line of sight flying was possible allowing pin point targeting of buildings/planes (Air Force 1).
Just some thoughts after absorbing the news of the last 30 hours or so.