Of the 33 passengers (excluding the four hijackers) who are on board Flight 93 on September 11, at least 16 are not originally booked on this flight, but arrange to be on it very shortly before 9/11, or—in some cases—on the morning of 9/11 itself: 
Environmental lawyer Alan Beaven arranges to take Flight 93 to San Francisco the day before 9/11, as he is duty-bound to go there to help settle a case after talks have just broken down. [San Francisco Chronicle, 9/17/2001; Sacramento Bee, 9/30/2001] Todd Beamer would normally have flown the night of September 10, as he has a business meeting scheduled for later in the day of 9/11. But he delays his flight, as he wants some time with his children after returning from a trip to Italy. [Pittsburgh Post-Gazette, 10/28/2001; MSNBC, 9/11/2006] He usually flies Continental Airlines, but chooses United to save his company money. [Longman, 2002, pp. 18] Edward Felt also usually flies Continental Airlines, but books himself onto Flight 93 at the last minute after his company gives him short notice of a meeting he needs to attend in San Francisco. [New Jersey Star-Ledger, 9/15/2001; Longman, 2002, pp. 194] Mark Bingham should be flying on September 10, but delays his flight as he has a hangover after a friend’s birthday party. [San Francisco Chronicle, 9/17/2001; Newsweek, 9/26/2001] Deora Bodley is originally scheduled to fly from Newark to San Francisco on September 11 on United Airlines Flight 91. [Sacramento Bee, 9/14/2001] She decides on the night of September 10 to switch to Flight 93, as its departure time is more than an hour earlier. [San Francisco Chronicle, 9/17/2001; Pittsburgh Post-Gazette, 10/28/2001] Lauren Grandcolas is booked on Flight 91, but on September 11 arrives early at the airport and switches to Flight 93. [Longman, 2002, pp. 12; MSNBC, 9/11/2006] Husband and wife Donald and Jean Peterson are booked on Flight 91, but also arrive early and switch to Flight 93. [Pittsburgh Post-Gazette, 10/28/2001; Longman, 2002, pp. 13 and 16] Christine Snyder calls the airport early in the morning of September 11 and transfers from Flight 91 to Flight 93 for an earlier start. [Pittsburgh Post-Gazette, 10/28/2001] Tom Burnett is scheduled for a later flight, but switches to Flight 93 to get home earlier. [Knight Ridder, 9/14/2001] According to journalist and author Jere Longman, he too is originally booked on Flight 91. [Longman, 2002, pp. 8] But the San Francisco Chronicle says he is originally booked on a Delta Airlines flight in the afternoon of 9/11. [San Francisco Chronicle, 9/17/2001] Georgine Corrigan switches flights when she checks in at the airport early in the morning of 9/11, so as to get home sooner; her original plane would make two stops on the way to San Francisco, but Flight 93 is non-stop. [Longman, 2002, pp. 12; Associated Press, 9/9/2006] Jeremy Glick should be on a flight the night of September 10. According to some accounts there are problems due to a fire at Newark Airport. [Dallas Morning News, 9/17/2001] The flight is rerouted to JFK Airport in New York and is due to arrive in California at 3:00 a.m., which does not suit Glick. [MSNBC, 9/11/2006] But according to Newsweek, Glick is originally due to take Flight 93 on September 10, but misses it after getting stuck in traffic on the way to the airport. [Newsweek, 9/22/2001] Nicole Miller’s original flight the night of September 10 is canceled due to a thunderstorm. [Saratoga News, 9/26/2001; Longman, 2002, pp. 55] She is then unable to get a seat on the same flight as her close friend Ryan Brown, as this is full, so takes Flight 93 instead. [Topeka Capital-Journal, 10/20/2002; MSNBC, 9/11/2006] Toy-company executive Lou Nacke is called by his boss the evening of September 10 and told to take the first plane to San Francisco, in order to help a customer. [Newsweek, 9/26/2001; Longman, 2002, pp. 124] In the few days prior to September 11, sisters-in-law Patricia Cushing and Jane Folger move forward the time of their flight. [Longman, 2002, pp. 33 and 35]
Flight 93’s pilot is not originally meant to be flying on September 11 (see Shortly Before September 11, 2001), and at least three of the flight attendants are also assigned to Flight 93 at a late date (see Shortly Before September 11, 2001). The 37 passengers (including the four hijackers) that are on board constitute just 20 percent of the plane’s passenger capacity of 182. [9/11 Commission, 8/26/2004, pp. 36]
Between 9:10 a.m. and 9:25 a.m. September 11, 2001: Wife Unable to Contact Flight 93 Passenger Tom Burnett on His Cell Phone
At her home in San Ramon, California, Deena Burnett has seen the television coverage of the attacks on the World Trade Center. Her husband, Tom Burnett, is due home from a business trip to New York later in the day. [Longman, 2002, pp. 106] However, he has switched from his original flight to the earlier Flight 93, and has not called ahead to notify her of this. [San Francisco Chronicle, 9/17/2001] Deena is expecting Tom to head home some time later this morning, but, concerned in case he finished his business early and took an earlier flight, she tries calling his cell phone. He does not answer. She later recalls, “This was not cause for immediate concern, because if he was on a flight already, use of cell phones was forbidden.” [Burnett and Giombetti, 2006, pp. 60-61] Minutes later, though, he makes the first in a series of calls to her from Flight 93, apparently using his cell phone (see 9:27 a.m. September 11, 2001). [Federal Bureau of Investigation, 9/11/2001 
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9:27 a.m. September 11, 2001: Flight 93 Passenger Tom Burnett Calls Wife Using Cell Phone; Reports that His Plane Has Been Hijacked
Tom Burnett, a passenger on Flight 93, calls his wife Deena Burnett at their home in San Ramon, California. [Longman, 2002, pp. 106-107] She looks at the caller ID and recognizes the number as being that of his cell phone. She asks him if he is OK, and he replies: “No, I’m not. I’m on an airplane that’s been hijacked.” He says, “They just knifed a guy,” and adds that this person was a passenger. [Burnett and Giombetti, 2006, pp. 61] (According to journalist and author Jere Longman, this would likely have been Mark Rothenberg in seat 5B; Burnett was assigned seat 4B. Rothenberg is the only first class passenger who does not make a call from the flight. [Longman, 2002, pp. 107] ) Deena asks, “Are you in the air?” She later recalls, “I didn’t understand how he could be calling me on his cell phone from the air.” According to Deena Burnett, Tom continues: “Yes, yes, just listen. Our airplane has been hijacked. It’s United Flight 93 from Newark to San Francisco. We are in the air. The hijackers have already knifed a guy. One of them has a gun. They’re telling us there’s a bomb on board. Please call the authorities.” [Burnett and Giombetti, 2006, pp. 61] (However, the 9/11 Commission will later conclude that the hijackers did not possess a gun, as Tom Burnett apparently claims here (see 9:27 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 13] ) At the end of the call, which lasts just seconds, Tom says he will call back and then hangs up. [Burnett and Giombetti, 2006, pp. 62] Deena does not have time to tell him about the planes crashing into the World Trade Center. [Sacramento Bee, 9/11/2002] But she writes down everything he tells her. [Burnett and Giombetti, 2006, pp. 62] She notes the call having occurred at 9:27 a.m. [Longman, 2002, pp. 107] Yet, the 9/11 Commission will later conclude that the hijacker takeover of Flight 93 does not occur until a minute later, at 9:28 (see (9:28 a.m.) September 11, 2001). [9/11 Commission, 8/26/2004, pp. 38] Deena later wonders if her husband made this call before the hijackers took control of the cockpit, as he’d spoken quietly and quickly, as if he were being watched. He has an ear bud and a mouthpiece attached to a cord that hangs over his shoulder, which may have enabled him to use his phone surreptitiously. [Longman, 2002, pp. 107] According to Deena Burnett’s account, this is the first of four calls Tom makes to her from Flight 93, all or most of which he makes using his cell phone. [Federal Bureau of Investigation, 9/11/2001 ; Associated Press, 9/13/2001; Burnett and Giombetti, 2006, pp. 75] However, a summary of passenger phone calls presented at the 2006 Zacarias Moussoui trial will state that Burnett makes only three calls from the plane; uses an Airfone, not his cell phone; and makes his frst call at 9:30, not 9:27 (see 9:30 a.m.-9:45 a.m. September 11, 2001). [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 9-10 ] This is the first of over 30 phone calls made by passengers from Flight 93. [MSNBC, 7/30/2002]
9:27 a.m. September 11, 2001: Passenger Reportedly Says Hijacker Has a Gun; 9/11 Commission Later Concludes Otherwise
According to Deena Burnett, when her husband Tom Burnett first calls her from Flight 93 (see 9:27 a.m. September 11, 2001), he mentions that one of the plane’s hijackers has a gun. [Longman, 2002, pp. 107; San Francisco Chronicle, 4/21/2002; Sacramento Bee, 9/11/2002] She will recall him telling her: “The hijackers have already knifed a guy. One of them has a gun. They’re telling us there’s a bomb on board.” [Burnett and Giombetti, 2006, pp. 61] However, contradicting this account, the 9/11 Commission will conclude that the Flight 93 hijackers do not possess a gun. It will state: “[N]one of the other callers [from Flight 93] reported the presence of a firearm. One recipient of a call from the aircraft recounted specifically asking her caller whether the hijackers had guns. The passenger replied that he did not see one. No evidence of firearms or of their identifiable remains was found at the aircraft’s crash site, and the cockpit voice recorder gives no indication of a gun being fired or mentioned at any time. We believe that if the hijackers had possessed a gun, they would have used it in the flight’s last minutes as the passengers fought back.” [9/11 Commission, 7/24/2004, pp. 13] News reports shortly after 9/11 and later in 2001 will mention Tom Burnett describing the hijackers having knives and claiming to have a bomb, but say nothing about him referring to a hijacker with a gun. [San Francisco Chronicle, 9/12/2001; Los Angeles Times, 9/13/2001; San Francisco Chronicle, 9/17/2001; Newsweek, 12/3/2001] According to notes of her initial interview with the FBI (see (12:30 p.m.) September 11, 2001), Deena Burnett tells the investigators that her husband described to her a passenger being knifed and the hijackers claiming to have a bomb. But the notes will make no mention of her saying she was told about a hijacker possessing a gun. [Federal Bureau of Investigation, 9/11/2001 ] And Deena apparently does not mention any gun in early interviews with the press, saying only: “[My husband] said, ‘I’m on the airplane, the airplane that’s been hijacked, and they’ve already knifed a guy. They’re saying they have a bomb. Please call the authorities.’” [Associated Press, 9/12/2001; CNN, 9/15/2001] But she will later state: “He told me one of the hijackers had a gun. He wouldn’t have made it up. Tom grew up around guns. He was an avid hunter and we have guns in our home. If he said there was a gun on board, there was.” [London Times, 8/11/2002]
9:30 a.m.-9:45 a.m. September 11, 2001: Tom Burnett Makes Three Airfone Calls from Flight 93, according to Later Trial Evidence
According to evidence presented at the 2006 Zacarias Moussaoui trial, passenger Tom Burnett makes just three phone calls from Flight 93 to his wife, Deena Burnett. According to the trial evidence, his first call, lasting 28 seconds, is at 9:30. At just before 9:38, he makes a second call, which lasts 62 seconds, and at 9:44 he makes his final call, lasting 54 seconds. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006] Although he was assigned a seat in row 4 near the front of the plane, records show he makes these calls using Airfones further back, in rows 24 and 25. [United States of America v. Zacarias Moussaoui, a/k/a Shaqil, a/k/a Abu Khalid al Sahrawi, Defendant., 4/11/2006 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 9-10 ] This evidence, however, contradicts the account given by Burnett’s wife. According to an FBI record of the interview, in her initial meeting with investigators (see (12:30 p.m.) September 11, 2001), Deena Burnett will say she received “a series of three to five cellular phone calls from her husband.” [Federal Bureau of Investigation, 9/11/2001 ] But she will subsequently say consistently that she received four phone calls from him. And, rather than occurring between 9:30 and 9:44, she notes them as having occurred at 9:27, 9:34, 9:45, and 9:54. [Pittsburgh Post-Gazette, 9/13/2001; New York Times, 9/13/2001; CNN, 9/11/2002; Burnett and Giombetti, 2006, pp. 61-67; Hour of Power, 9/10/2006; MSNBC, 9/11/2006] While the trial evidence states that Tom Burnett makes his calls from the plane using Airfones, other accounts will report that he makes all—or all but one—of them using his cell phone. [Associated Press, 9/13/2001; Longman, 2002, pp. 107-111 and 118; Washington Post, 4/19/2002; San Francisco Chronicle, 4/21/2002; CBS News, 9/10/2003]
9:31 a.m.-9:34 a.m. September 11, 2001: Deena Burnett Reports Husband’s Call from Flight 93 to Police and FBI
After receiving a call from her husband Tom Burnett, who is on the hijacked Flight 93 (see 9:27 a.m. September 11, 2001), Deena Burnett calls 911 to report the hijacking. She used to be a flight attendant, so knows what to say in an emergency. Her 911 call is recorded and she will later be provided with a tape of it. According to journalist and author Jere Longman, who is played this tape, Deena reports: “My husband just called me from United Flight 93. The plane has been hijacked. They just knifed a passenger and there are guns on the airplane.” [Longman, 2002, pp. 107-108 and 278] However, in her 2006 book, Deena Burnett will give a slightly different account according to which she makes no mention of guns on the plane, instead telling the dispatcher: “My husband is on an airplane that has been hijacked. He just called me from the airplane on his cellular telephone. He told me they have a bomb on board.” [Burnett and Giombetti, 2006, pp. 62-63] (Note that the 9/11 Commission later concludes that the Flight 93 hijackers do not possess guns (see 9:27 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 13] ) Deena then tells the dispatcher the flight number and route. Her call is transferred to a man at the police department, who then switches her to the FBI. She repeats her story to a special agent, who initially misunderstands her, thinking she is saying her husband was on one of the planes that hit the World Trade Center. Once she has clarified that he is on another plane, the agent gives her a list of questions to ask her husband if she speaks with him again, such as how many hijackers are there and what weapons do they have? At that moment, her call waiting beeps, as Tom Burnett is calling a second time (see 9:34 a.m. September 11, 2001). [Sacramento Bee, 9/11/2002; Burnett and Giombetti, 2006, pp. 63] Deena will be unable to ask Tom the questions the agent has asked her to during his subsequent calls from Flight 93, because, she later recalls, “I didn’t want to take up any precious time talking any more than was necessary,” and “I had wanted to hear Tom’s voice.” Instead, she writes down everything he says and everything that is going on. [Burnett and Giombetti, 2006, pp. 68] According to Longman, Deena will call the FBI back minutes later, following her husband’s second call (see (Between 9:36 a.m. and 9:45 a.m.) September 11, 2001). [Longman, 2002, pp. 110] But according to Deena Burnett’s 2006 book, she will not speak to the FBI agent again until around 10:00 a.m., after her husband’s final call to her from Flight 93 (see (Shortly After 9:56 a.m.) September 11, 2001). [Burnett and Giombetti, 2006, pp. 68-69]
9:34 a.m. September 11, 2001: Flight 93 Passenger Burnett Calls Again, Learns Hijackers Are on Suicide Mission
Tom Burnett, a passenger on the hijacked Flight 93, calls his wife Deena Burnett a second time from the aircraft and is told about the planes hitting the World Trade Center. [Sacramento Bee, 9/11/2002] Deena is on the phone with an FBI agent, reporting her husband’s previous call from the plane (see 9:31 a.m.-9:34 a.m. September 11, 2001), when she hears her call-waiting beep. She answers her husband’s call, making a note of the time. [Newsweek, 12/3/2001; Longman, 2002, pp. 109-110] Tom tells her the plane’s hijackers are “in the cockpit. The guy they knifed is dead.… I tried to help him, but I couldn’t get a pulse.” [Burnett and Giombetti, 2006, pp. 64] (According to journalist and author Jere Longman, Burnett is likely referring here to fellow passenger Mark Rothenberg. [Longman, 2002, pp. 107] ) Deena says: “Tom, they are hijacking planes all up and down the East coast. They are taking them and hitting designated targets. They’ve already hit both towers of the World Trade Center.” [Burnett and Giombetti, 2006, pp. 64] (When the FBI later interviews her (see (12:30 p.m.) September 11, 2001), Deena will say it seemed her husband was already aware at this time that other flights had crashed into the WTC, although this possibility is not specifically brought up during their call. [Federal Bureau of Investigation, 9/11/2001 ] ) Tom says the hijackers are “talking about crashing this plane.” He adds: “Oh my gosh! It’s a suicide mission.” Deena hears him repeating the information she has told him to other people. When she asks who this is, he tells her he is talking to his seatmate. [Federal Bureau of Investigation, 9/11/2001 ; Burnett and Giombetti, 2006, pp. 64] Tom wants to know if commercial aircraft have been hijacked, how many planes and which airlines are involved, and who is involved? [Longman, 2002, pp. 110] He then says: “We’re turning back toward New York. We’re going back to the World Trade Center. No, wait, we’re turning back the other way. We’re going south.” He reports: “We’re over a rural area. It’s just fields. I’ve gotta go.” He then hangs up. The call has lasted about two minutes. [Burnett and Giombetti, 2006, pp. 64] According to Longman, unlike his previous call, which he made using his cell phone, Tom Burnett makes this call using an Airfone. [Longman, 2002, pp. 110] But other reports will state that he makes all four of his calls from Flight 93 using his cell phone. [Associated Press, 9/13/2001; Washington Post, 4/19/2002; San Francisco Chronicle, 4/21/2002] According to notes of Deena Burnett’s later interview with the FBI, all Tom’s calls are made using his cell phone, but “one of the calls did not show on the caller identification as [Deena] was on the line with another call” when it was made. This could be referring to this second call, which occurred while Deena was on the phone with the FBI agent. [Federal Bureau of Investigation, 9/11/2001 ]
9:41 a.m. September 11, 2001: FBI Agent Already Aware of Flight 93 Hijacking
Newark, New Jersey, flight controller Greg Callahan is talking on the phone to an FBI agent. The agent says about Flight 93: “We suspect that this aircraft has now been taken over by hostile forces.” The agent describes the sharp turn it has made over eastern Ohio and that it is now heading back over southwestern Pennsylvania. Callahan says he could tell the plane is on a course for Washington. [MSNBC, 9/11/2002] The FBI has been in contact with Deena Burnett and informed of what her husband, Flight 93 passenger Tom Burnett, has been saying since at least 9:34 a.m. (see 9:34 a.m. September 11, 2001) [Longman, 2002, pp. 110] It is unclear where in the chain of command details of these Flight 93 calls reach, and the 9/11 Commission has not clarified the issue of what the FBI knew and when.
9:45 a.m. September 11, 2001: Tom Burnett Makes Third Call; Says Flight 93 Passengers Are Making Plans to Defeat Hijackers
Flight 93 passenger Tom Burnett calls his wife Deena Burnett for the third time. She is able to determine that he is using his cell phone, as the caller identification shows his number. [Federal Bureau of Investigation, 9/11/2001 ] She had just seen the television reports about the Pentagon being hit, and mistakenly thought Tom’s plane had crashed into it. [Longman, 2002, pp. 111] She asks, “Tom, you’re okay?” but he replies, “No, I’m not.” Deena tells him, “They just hit the Pentagon.” She hears him repeating this information to people around him. She continues: “They think five airplanes have been hijacked. One is still on the ground. They believe all of them are commercial planes. I haven’t heard them say which airline, but all of them have originated on the East Coast.” She doesn’t know who is involved in the attacks. [Sacramento Bee, 9/11/2002; Burnett and Giombetti, 2006, pp. 65-66] The hijackers had earlier told the passengers there was a bomb on Flight 93 (see 9:27 a.m. September 11, 2001). [Federal Bureau of Investigation, 9/11/2001 ; Longman, 2002, pp. 107] But now Tom appears to doubt this. He asks Deena, “What is the probability of them having a bomb on board?” He then answers himself: “I don’t think they have one. I think they’re just telling us that for crowd control.” Based on her experience as a former flight attendant, Deena says, “A plane can survive a bomb if it’s in the right place.” Tom continues: “[The hijackers are] talking about crashing this plane into the ground. We have to do something. I’m putting a plan together.” He says “several people” are helping him. “There’s a group of us.” Deena is surprised, but reassured, at her husband’s calmness. She will recall that it is as if he were at work, “sitting at his desk, and we were having a regular conversation.” He tells her he will call back, and then hangs up. A policeman then arrives at Deena Burnett’s house, no doubt in response to her earlier 911 call (see 9:31 a.m.-9:34 a.m. September 11, 2001), and follows her inside. [Sacramento Bee, 9/11/2002; Burnett and Giombetti, 2006, pp. 66]
9:54 a.m. September 11, 2001: Flight 93 Passenger Tom Burnett Calls for Fourth Time; Details Plan to Take Control of Plane
Passenger Tom Burnett makes his fourth and final call from Flight 93 to his wife Deena Burnett. Deena makes a note of the time of the call. [Longman, 2002, pp. 118] Tom asks her, “Anything new?” and then, “Where are the kids?” When Deena says their three young daughters are asking to talk to him, Tom says, “Tell them I’ll talk to them later.” After a pause, he explains that he and some of the other passengers are going to try and seize control of the plane from the hijackers: “We’re waiting until we’re over a rural area. We’re going to take back the airplane.” He adds: “If they’re going to crash this plane into the ground, we’re going to have to do something.… We can’t wait for the authorities. I don’t know what they could do anyway. It’s up to us. I think we can do it.” He remains calm throughout the conversation. He tells Deena to just pray. [Sacramento Bee, 9/11/2002; Burnett and Giombetti, 2006, pp. 66-67] According to notes of Deena Burnett’s initial interview with the FBI (see (12:30 p.m.) September 11, 2001), Tom tells Deena he may not speak to her again. [Federal Bureau of Investigation, 9/11/2001 ] But in her 2006 book, Deena Burnett will describe Tom saying: “Don’t worry. I’ll be home for dinner. I may be late, but I’ll be home.” Finally he says, “We’re going to do something,” and then hangs up. The call lasts less than two minutes. [Burnett and Giombetti, 2006, pp. 67] Tom does not give any personal message to his wife during the call. [CNN, 9/12/2001] Deena will later reflect: “He honestly expected to be home later that morning. If he thought he was going to die on that plane, he would have called his parents and sisters and talked to his daughters. At the very least, he would have given me a message for them. But he didn’t ask to speak to any of them. He was fighting to live.” [Burnett and Giombetti, 2006, pp. 68]
