Pilot Jason Dahl, who will be at the controls of United Airlines Flight 93—the fourth hijacked aircraft—on 9/11, is not originally scheduled for that flight, but wants to get in extra hours so he can take time off work for his fifth wedding anniversary on September 14. [Pittsburgh Post-Gazette, 10/28/2001; MSNBC, 9/11/2006] Therefore, some time shortly before 9/11, he trades a trip later in September in order to fly September 11. [Denver Post, 12/16/2001; Longman, 2002, pp. 1] Yet the week before September 11, he sends out an e-mail seeking another pilot to take his place, so he can have that day with his family. [Rocky Mountain News, 9/12/2001; New York Times, 9/15/2001; San Francisco Chronicle, 9/17/2001] Pilots on two of the other aircraft hijacked on 9/11 are also not originally scheduled to fly that day, but are booked onto those planes shortly before September 11 (see September 10, 2001, Shortly Before September 11, 2001, and Shortly Before September 11, 2001).
9:21 a.m. September 11, 2001: Flight 93 Sends Routine Message to Airline Dispatcher
The pilot of Flight 93 sends a routine text message to United Airlines dispatcher Ed Ballinger, who is monitoring the flight. The message reads: “Good mornin‘… Nice clb [climb] outta EWR [Newark airport] after a nice tour of the apt [apartment] courts y [and] grnd cntrl. 20 N EWC At 350 occl [occasional] lt [light] chop. Wind 290/50 ain’t helping. J.” The J is presumably the signature for the pilot, Jason Dahl, who is personally acquainted with Ballinger. [9/11 Commission, 8/26/2004, pp. 37]
9:23 a.m.-9:26 a.m. September 11, 2001: United Airlines Dispatcher Sends Warning Message to Flight 93, Flight 93 Responds
Ed Ballinger, the United Airlines flight dispatcher monitoring Flight 93, sends a warning message to this flight, telling the pilots to beware of any cockpit intrusion. [9/11 Commission, 7/24/2004, pp. 11] At 9:21, United Airlines instructed its dispatchers to warn their flights to secure their cockpit doors (see 9:21 a.m. September 11, 2001), but Ballinger had already taken the initiative two minutes earlier to begin warning the 16 flights he is monitoring (see 9:19 a.m. September 11, 2001). His text message reads: “Beware any cockpit intrusion… Two aircraft in NY hit [World] Trade Center builds.” Because this message is sent out to Ballinger’s 16 aircraft in groups, it is not until 9:23 a.m. that it is transmitted to Flight 93. [9/11 Commission, 1/27/2004; 9/11 Commission, 8/26/2004, pp. 26 and 37] The warning is received in the plane’s cockpit one minute later. [9/11 Commission, 7/24/2004, pp. 11] Then, at 9:26, Flight 93 pilot Jason Dahl responds with the text message, “Ed confirm latest mssg plz [message please]—Jason.” Apart from a routine radio contact with the FAA’s Cleveland Center a minute later (see 9:27 a.m. September 11, 2001), this is the last normal communication made from Flight 93’s cockpit before the hijacking occurs. [9/11 Commission, 8/26/2004, pp. 38] Ballinger will later complain: “One of the things that upset me was that they knew 45 minutes before that American Airlines [Flight 11] had a problem. I put the story together myself [from news accounts]. Perhaps if I had the information sooner, I might have gotten the message to [Flight] 93 to bar the door.” [Chicago Daily Herald, 4/14/2004]
9:28 a.m. September 11, 2001: Cleveland Flight Control Hears Sounds of Struggle as Flight 93 Is Hijacked
According to the 9/11 Commission, less than a minute after Flight 93 acknowledged a routine radio transmission from the FAA’s Cleveland Center (see 9:27 a.m. September 11, 2001), John Werth—the controller handling the flight—and pilots of other aircraft in the vicinity of Flight 93 hear “a radio transmission of unintelligible sounds of possible screaming or a struggle from an unknown origin.” [Federal Aviation Administration, 9/11/2001; 9/11 Commission, 6/17/2004 
; CBS News, 9/10/2006] Someone, presumably Flight 93’s pilot Jason Dahl, is overheard by controllers as he shouts, “Mayday!” [New York Times, 7/22/2004] Seconds later, the controller responds, “Somebody call Cleveland?” Then there are more sounds of screaming and someone yelling, “Get out of here, get out of here.” [Toronto Sun, 9/16/2001; Newsweek, 9/22/2001; Observer, 12/2/2001; MSNBC, 7/30/2002; 9/11 Commission, 6/17/2004 ] Then the voices of the hijackers can be heard talking in Arabic. The words are later translated to show they are talking to each other, saying, “Everything is fine.” [Newsweek, 12/3/2001] Later, passenger phone calls will describe two dead or injured bodies just outside the cockpit; presumably these are the two pilots. [New York Times, 7/22/2004]
