Mohamed Atta and Abdulaziz Alomari check in at the US Airways counter at Portland International Jetport Airport. [Portland Press Herald, 10/5/2001; Federal Bureau of Investigation, 10/14/2001]* They are wearing ties and jackets. Atta checks in two bags, Alomari none. Atta is randomly selected for additional security scrutiny by the FAA’s Computer Assisted Passenger Prescreening System (CAPPS) (see (6:20 a.m.-7:48 a.m.) September 11, 2001). However, the only consequence is that his checked bags will be held off the plane until it is confirmed that he has boarded. [9/11 Commission, 7/24/2004, pp. 1; 9/11 Commission, 8/26/2004, pp. 2 ; CNN, 3/3/2006] Noting that their flight is soon due to leave, the ticket agent who checks them in, Michael Tuohey, says, “You’re cutting it close.” [Portland Press Herald, 3/6/2005] Tuohey thinks the pair seems unusual. He notices they both have $2,500 first-class, one-way tickets. He later comments, “You don’t see many of those.” Atta looks “like a walking corpse. He looked so angry.” In contrast, Tuohey says, Alomari can barely speak English and has “a goofy smile, I can’t believe he knew he was going to die that day.” Tuohey will later recount, “I thought they looked like two Arab terrorists but then I berated myself for the stereotype and did nothing.” [Philadelphia Daily News, 2/24/2005; Mirror, 9/11/2005; CNN, 3/3/2006] Atta becomes angry when Tuohey informs him he will have to check in again in Boston. He complains that he was assured he would have a “one-step check-in.
(6:45 a.m.) September 11, 2001: Israeli Company Given Two Hours’ Notice of Attack
Two employees of Odigo, Inc., an Israeli company, receive warnings of an imminent attack in New York City about two hours before the first plane hits the WTC. Odigo, one of the world’s largest instant messaging companies, has its headquarters two blocks from the WTC. The Odigo Research and Development offices where the warnings were received are located in Herzliyya, a suburb of Tel Aviv. Israeli security and the FBI were notified immediately after the 9/11 attacks began. The two employees claim not to know who sent the warnings. “Odigo service includes a feature called People Finder that allows users to seek out and contact others based on certain interests or demographics. [Alex] Diamandis [Odigo vice president of sales and marketing] said it was possible that the attack warning was broadcast to other Odigo members, but the company has not received reports of other recipients of the message.” [Ha'aretz, 9/26/2001; Washington Post, 9/27/2001] Odigo claims the warning did not specifically mention the WTC, but the company refuses to divulge what was specified, claiming, “Providing more details would only lead to more conjecture.” [Washington Post, 9/28/2001] However, a later newspaper report claims that the message declared “that some sort of attack was about to take place. The notes ended with an anti-Semitic slur. ‘The messages said something big was going to happen in a certain amount of time, and it did—almost to the minute,’ said Alex Diamandis, vice president of sales for the high-tech company… He said the employees did not know the person who sent the message, but they traced it to a computer address and have given that information to the FBI.” [Washington Post, 10/4/2001] Odigo gave the FBI the Internet address of the message’s sender so the name of the sender could be found. [Deutsche Presse-Agentur (Hamburg), 9/26/2001] Two months later, it is reported that the FBI is still investigating the matter, but there have been no reports since. [Courier Mail, 11/20/2001]
Shortly before Flight 93 reverses direction and heads east, someone in its cockpit radios in and asks the FAA for a new flight plan, with a final destination of Washington, DC. [ABC News, 9/11/2001; ABC News, 9/14/2001] Jeff Krawczyk, the chief operating officer of a company that tracks aircraft movements, later comments, “We hardly ever get a flight plan change. Very unusual.” [Washington Business Journal, 9/11/2001] Who it is that makes this request is unclear. The hijacker takeover of Flight 93 occurred around 9:28 a.m. (see (9:28 a.m.) September 11, 2001) [9/11 Commission, 7/24/2004, pp. 11] , so it is presumably made by one of the hijackers. Twenty-five minutes later the pilot hijacker will also program a new destination into the plane’s navigational system (see 9:55 a.m. September 11, 2001).
Sarasota elementary school principal Gwen Tose-Rigell is summoned to a room to talk with President Bush. She recalls, “He said a commercial plane has hit the World Trade Center, and we’re going to go ahead and go on, we’re going on to do the reading thing anyway.” [Associated Press, 8/19/2002] One local reporter notes that at this point, “He could and arguably should have left Emma E. Booker Elementary School immediately, gotten onto Air Force One and left Sarasota without a moment’s delay.” [Sarasota Herald-Tribune, 9/12/2001]
( Bush left at about 9:16- MS)
*Links in brackets  do not always bring the reader to proper source: rather they bring him to the site in question. But I left them as they are in the main link above- MS.
I have been in the Bayesian analysis (the approach to fortify or denigrate the probability for the truthfulness of the original hypothesis in the light of the new, updated data) for a while and although I surely do not claim I had built an event tree and completed the analysis, 7 years is enough time to make some ‘most likely’ conclusions. The perfect chronological recording of events ( see the link above) makes it possible as well as developing Bayesian logic rules and assigning probabilities. I thus had developed a theory on the 9/11 event and that theory, obviously does not pretend to be an absolute truth. Still, I believe it has the same right to exist and be known as all the other theories developed so far due to that unfortunate circumstance that the due process of forensic investigation and subsequent trial was never implemented. Anyone thus can use his imagination.