I have obtained a new document via FOIA request. It is an FAA memo comprising a transcript of calls between various FAA facilities and other institutions on the day of 9/11, and was referenced in the 9/11 Commission Report, in endnote 128 to Chapter 1 (on page 459). It is not spectacularly exciting, but touches on awareness of all four hijacks, in particular the last three. You can find it here.
October 18, 2008
August 6, 2008
New 9/11 Timeline Category: Shanksville
The 9/11 Timeline has been given a new category to cover events in Shanksville, where United 93 is thought to have crashed, on the day of 9/11. You can find it here.