Context of '(10:15 a.m.) September 11, 2001: NORAD Operations Center in Colorado Closes Its Blast Doors'

US Central Command raises the force protection condition level for US forces based in the Arabian peninsula and the Persian Gulf. In six countries the force protection level is raised to Delta, the highest level possible. The US orders all its naval ships docked in those countries out to sea, and the US Fifth Fleet moves out of port in Bahrain. Regional military exercises are canceled and US embassies are temporarily closed. [9/11 Commission, 7/24/2004, pp. 256-257, 534] This is partly in response to an al-Qaeda video which surfaced the previous week containing the message, “It’s time to penetrate America and Israel and hit them where it hurts most” (see June 19, 2001). [Bamford, 2004, pp. 241; 9/11 Commission, 7/24/2004, pp. 256, 534] Additionally, Newsweek reports at the time that this alert comes after “Western intelligence agencies picked up ‘quite reliable’ signs of increased activity among Islamic extremists with Afghanistan ties. These indications are said to have included information picked up through electronic monitoring of suspected militants, who US experts say have acquired fairly sophisticated communications and computer equipment.” [Newsweek, 7/22/2001] However, as author James Bamford later notes, “No precautions were ever taken within the United States, only overseas.” [Bamford, 2004, pp. 241]

The NORAD headquarters building at Peterson Air Force Base. [Source: US Air Force]General Ralph Eberhart, the commander of NORAD, realizes the US is under attack after he sees Flight 175 crashing into the World Trade Center on television and then considers whether he should go to NORAD’s Cheyenne Mountain Operations Center (CMOC). Eberhart was at his home in Colorado when he learned about the hijacking of Flight 11 and then went to his office at NORAD’s headquarters at Peterson Air Force Base in Colorado Springs (see (8:45 a.m.-9:00 a.m.) September 11, 2001). In his office, he sees the second hijacked plane, Flight 175, crashing into the WTC live on television at 9:03 a.m. (see 9:03 a.m. September 11, 2001). He is unaware that a second aircraft has been hijacked, but realizes immediately that a coordinated terrorist attack is taking place. Right away, he tries to contact General Henry Shelton, the chairman of the Joint Chiefs of Staff, but is unable to do so, because Shelton is currently airborne, being flown to Hungary for a NATO conference (see 7:15 a.m. September 11, 2001). Eberhart then tries contacting General Richard Myers, the vice chairman of the Joint Chiefs of Staff, and is able to reach him on Capitol Hill, where he has been meeting Senator Max Cleland (D-GA) (see (9:37 a.m.) September 11, 2001). Eberhart then focuses his attention on determining whether he should stay at NORAD headquarters or go to the CMOC, which is about 30 minutes’ drive away from Peterson Air Force Base. He initially decides to stay in his office. This, he will say, is because the CMOC is already well manned and also because there are “dead spots” in which he would be out of phone coverage for five to 10 minutes at a time during the drive to the operations center. However, Eberhart subsequently decides to go to the CMOC. He will tell the 9/11 Commission that he leaves his office to head there at approximately 9:30 a.m., during a lull in transmissions on a teleconference, which he is presumably listening to. [9/11 Commission, 3/1/2004; 9/11 Commission, 3/1/2004 ; 9/11 Commission, 3/1/2004; 9/11 Commission, 3/1/2004] He will experience problems receiving phone calls while he is traveling to the CMOC (see (Between 9:35 a.m. and 10:35 a.m.) September 11, 2001). [Colorado Springs Gazette, 6/16/2006; Denver Post, 7/28/2006]

Counterterrorism “tsar” Richard Clarke, who is in the White House Situation Room, instructs that US embassies overseas be closed and that US military bases raise their alert level. According to his own recollection, just after he has spoken to the acting Chairman of the Joint Chiefs of Staff Richard Myers (see 9:28 a.m. September 11, 2001), Clarke is thinking about the simultaneous attacks on the US embassies in Kenya and Tanzania in 1998 (see 10:35-10:39 a.m., August 7, 1998). As he describes, “There was the possibility now of multiple simultaneous attacks in several countries.” He therefore issues instructions to the State Department and the Department of Defense: “We have to assume there will be simultaneous attacks on us overseas. We need to close the embassies. Move [Department of Defense] bases to combat Threatcon.” [Clarke, 2004, pp. 5-6] (“Threatcon” is short for “terrorist threat condition.” [Slate, 9/12/2001] ) According to CNN, all US military forces will be ordered to the highest alert level at 10:10 a.m. (see (Between 10:10 a.m. and 10:35 a.m.) September 11, 2001). [CNN, 9/4/2002] But the 9/11 Commission Report will state that Secretary of Defense Donald Rumsfeld only orders the US armed forces to Defcon 3, an increased state of readiness, at 10:43 a.m. (see (10:43 a.m.-10:52 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 326 and 554] The State Department will tell US embassies to make the decision whether to close based on their own local security requirements. Around 50 US embassies or consulates around the world will therefore close, though at what time they do so is unstated. [US Department of State, 9/12/2001]

In the middle of the 9/11 attacks, General Ralph Eberhart, the commander of NORAD, drives from his NORAD headquarters office at Peterson Air Force Base, Colorado to the NORAD operations center in Cheyenne Mountain, about a dozen miles away. The journey reportedly takes him 45 minutes and en route he loses a cell phone call with Vice President Cheney. The reason he makes this journey is unknown, though it is reported that there are superior communications capabilities available at Cheyenne Mountain. [Colorado Springs Gazette, 6/16/2006; Denver Post, 7/28/2006; Washington Post, 7/29/2006] The exact times when Eberhart departs Peterson AFB and arrives at Cheyenne Mountain are unclear. General Richard Myers says that Eberhart phones him from Peterson either just before or just after the Pentagon is hit, which suggests that Eberhart heads out some time between 9:35 a.m. and 9:40 a.m. [Armed Forces Radio And Television Service, 10/17/2001; 9/11 Commission, 6/17/2004] Eberhart tells the 9/11 Commission that when he arrives at the NORAD operations center, the order to shoot down hijacked aircraft has already been passed down NORAD’s chain of command. According to the commission’s timeline, this would indicate he arrives after 10:31 a.m. (see 10:31 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 42] Yet other reports state that the massive blast doors to Cheyenne Mountain are shut at around 10:15 a.m. (see (10:15 a.m.) September 11, 2001), which suggests that Eberhart arrives earlier.

At the time the Pentagon is struck, a member of the Defense Protective Service (DPS), which guards the Pentagon, is in the process of ordering the threat level be raised. John Pugrud, the deputy chief of the DPS, has met with DPS Chief John Jester, and Jester directed him to instruct the DPS Communications Center to raise the Force Protection Condition up one level, from Normal to Alpha (see (Shortly Before 9:37 a.m.) September 11, 2001). The moment the Pentagon is hit, Pugrud has the phone in his hand to dial the center. When his call is answered, he can hear the center’s alarms activating and radio calls taking place. The dispatcher yells: “We’ve been hit! We’ve been hit! Wedge one. Wedge one.” According to the Defense Department’s book about the Pentagon attack, no one in DPS has received any warning of a hijacked aircraft heading toward Washington. [Goldberg et al., 2007, pp. 152] No steps have been taken to alert Pentagon employees or evacuate the building. [Vogel, 2007, pp. 429] Around 30 minutes after the attack occurs, the US military will increase its threat level to Defcon Delta, the highest possible level (see (Between 10:10 a.m. and 10:35 a.m.) September 11, 2001). [CNN, 9/4/2002] This will be reduced to “Charlie” before the end of the week. [US Department of Defense, 9/16/2001; USA Today, 9/16/2001]

The NORAD representative on the air threat conference call reports that NORAD has yet to give an assessment for the crisis that is taking place and adds that General Ralph Eberhart, the commander of NORAD, has not yet declared the situation an air defense emergency. [US Department of Defense, 9/11/2001] The National Military Command Center (NMCC) at the Pentagon has just started an air threat conference call in response to the terrorist attacks (see 9:37 a.m.-9:39 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 37] A NORAD representative, in their first communication over the conference call, states: “No assessment has been given for this event at this point. No assessment for the overall air situation has been given at this point.” The representative adds that “CINC NORAD”—meaning Eberhart, the commander in chief of NORAD—“is not declaring [an] air defense emergency at this point.” [US Department of Defense, 9/11/2001] An “air defense emergency” is defined by the US government as an “emergency condition which exists when attack upon the continental United States, Alaska, Canada, or US installations in Greenland by hostile aircraft or missiles is considered probable, is imminent, or is taking place.” [US Government, 7/1/2003] British online publication The Register will later comment that this definition “sums up the tragic events of [September 11] fairly well.” The declaration of an air defense emergency, according to The Register, “invokes a regulatory scheme known as Security Control of Air Traffic and Air Navigation Aids (SCATANA).” [Register, 9/17/2001] SCATANA is a procedure, developed in the 1960s, that was originally intended to clear the airspace above the US in the event of a confirmed warning of a nuclear attack by the Soviet Union. [Schwartz, 1998; Bulletin of the Atomic Scientists, 11/2001] Eberhart will order a limited version of it later in the day, apparently around 11:00 a.m. (see (11:00 a.m.) September 11, 2001). [Aviation Week and Space Technology, 6/3/2002; 9/11 Commission, 6/17/2004] Eberhart was at NORAD headquarters at Peterson Air Force Base, Colorado, when the attacks began, but at some point headed out to the NORAD operations center in Cheyenne Mountain (see (Between 9:35 a.m. and 10:35 a.m.) September 11, 2001). [9/11 Commission, 3/1/2004 ; Colorado Springs Gazette, 6/16/2006; Denver Post, 7/28/2006]

Acting Chairman of the Joint Chiefs of Staff Richard Myers enters the National Military Command Center (NMCC) within the Pentagon, though exactly when this happens remains unclear. According to his own statements, he was on Capitol Hill, in the offices of Senator Max Cleland (D-GA), from just before 9:00 a.m. until around the time the Pentagon was hit. He’d then headed back to the Pentagon (see Shortly Before 9:00 a.m. September 11, 2001 and (Shortly After 9:37 a.m.) September 11, 2001). [Armed Forces Radio And Television Service, 10/17/2001; MSNBC, 9/11/2002; Council on Foreign Relations, 6/29/2006] According to the 9/11 Commission, Myers joins the air threat conference call from the NMCC at “shortly before 10:00.” [9/11 Commission, 7/24/2004, pp. 38] But the American Forces Press Service reports that he arrives at the NMCC “about 15 minutes” before Secretary of Defense Donald Rumsfeld (who arrives around 10:30), meaning at about 10:15 a.m. [American Forces Press Service, 9/8/2006] Rumsfeld claims that, as he enters the NMCC, Myers has “just returned from Capitol Hill.” [9/11 Commission, 3/23/2004] Cleland verifies that Myers was with him on Capitol Hill until around the time of the Pentagon attack. [CNN, 11/20/2001; Atlanta Journal-Constitution, 6/16/2003] But counterterrorism “tsar” Richard Clarke claims that Myers has been taking part in a video conference since shortly after the second attack on the WTC, and has been visible on the Pentagon screen (see (9:10 a.m.) September 11, 2001 and 9:28 a.m. September 11, 2001), thereby implying Myers has been at the Pentagon all along. [Clarke, 2004, pp. 3 and 5] Myers tells the 9/11 Commission, “After I reached the National Military Command Center (NMCC), I asked questions to determine where Secretary Rumsfeld was, how the FAA was handling airborne flights, and the status of fighters prepared to intercept any hijacked aircraft inbound to Washington.” [9/11 Commission, 6/17/2004 ]

US military installations are placed on the highest state of alert, known as Force Protection Condition Delta (FPCON Delta), in response to the terrorist attacks in New York and at the Pentagon. The raised threat level applies to every US military installation across the country and around the world, and every member of the US armed forces. [Associated Press, 9/11/2001; US Department of Defense, 9/11/2001; New York Times, 9/12/2001] Measures that are taken once FPCON Delta has been declared include placing more guards on duty at installations, having all vehicles on installations identified, and having all personnel positively identified. Additionally, all suitcases, briefcases, and packages brought into an installation must be searched. [Slate, 9/12/2001]
Rumsfeld and Myers Decide to Raise FPCON - The decision to raise the force protection condition is apparently made by Secretary of Defense Donald Rumsfeld and/or acting Chairman of the Joint Chiefs of Staff Richard Myers. Rumsfeld will tell the 9/11 Commission that after he arrives at the Pentagon’s National Military Command Center (NMCC) (see (10:30 a.m.) September 11, 2001), he and Myers “discussed, and I recommended… increasing the force protection level.” [9/11 Commission, 3/23/2004] Myers will later write that after he arrives at the NMCC (see (Between 9:55 a.m. and 10:25 a.m.) September 11, 2001), he “recommended that all American military commands and units worldwide go to [FPCON] Delta.” He will add: “Terrorists had staged major attacks in New York and Washington. Although we did not yet have reliable intelligence on when and where they would strike next, it seemed likely that they would.” [Myers, 2009, pp. 153] But White House counterterrorism chief Richard Clarke will write that he gave the instruction to raise the force protection condition, at around 9:30 a.m. (see (9:29 a.m.) September 11, 2001). [Clarke, 2004, pp. 5-6]
Conflicting Times Given for Raising of FPCON - The exact time at which the force protection condition is raised is unclear. CNN’s Barbara Starr will report that “all US military forces [are] ordered to Condition Delta” at 10:10 a.m. [CNN, 9/4/2002] However, other evidence indicates the force protection condition is raised at a later time, around 10:35 a.m. Rumsfeld only enters the NMCC at about 10:30 a.m., indicating it is raised after that time. [9/11 Commission, 7/24/2004, pp. 43-44] And at 10:38 a.m., after Vice President Dick Cheney asks him on the air threat conference call if US forces are on “heightened alert,” Rumsfeld will reply, “Yes,” and say they are at FPCON Delta. [US Department of Defense, 9/11/2001 ]
Some Areas Already at FPCON Delta - Although the entire US military is now under the same FPCON level, usually, different locations can have different FPCON levels. [Slate, 9/12/2001] US forces in some parts of the world, particularly the Middle East and the Persian Gulf region, are in fact already at FPCON Delta. [New York Times, 9/12/2001] (The force protection condition was raised in those areas in late June, after intelligence reports suggested that terrorists might attack American military or civilian targets in the region (see June 21, 2001). [Los Angeles Times, 6/23/2001; National Public Radio, 5/23/2002; 9/11 Commission, 7/24/2004, pp. 257] ) Shortly after the force protection condition is raised, Rumsfeld will order that the defense readiness condition also be raised (see (10:43 a.m.-10:52 a.m.) September 11, 2001). [US Department of Defense, 9/11/2001 ; 9/11 Commission, 7/24/2004, pp. 326, 554]
Five Possible Force Protection Conditions - The force protection condition is a “chairman of the Joint Chiefs of Staff-approved standard for identification of, and recommended responses to, terrorist threats against US personnel and facilities,” according to the Department of Defense. [US Department of Defense, 11/8/2011 ] It was created in June 2001 and replaced the “terrorist threat condition,” or “Threatcon.” [Los Angeles Times, 1/22/2002] There are five possible force protection conditions. The lowest, FPCON Normal, means no threat of terrorist activity is present. The other conditions are Alpha, Bravo, Charlie, up to the highest, FPCON Delta, which means a terrorist attack has occurred or intelligence has been received indicating that action against a specific location is likely. [Associated Press, 9/11/2001; Slate, 9/12/2001]

Blast doors at NORAD’s operations center in Cheyenne Mountain, Colorado. [Source: Eugene Chavez]The massive doors leading to NORAD’s operations center in Cheyenne Mountain, Colorado, designed to protect the center from a nuclear blast, are closed for the first time ever in a real-world, non-exercise event, though the reason for this is unclear. [Toronto Star, 12/9/2001; Aviation Week and Space Technology, 6/3/2002; BBC, 9/1/2002; North American Aerospace Defense Command, 9/9/2011] The two steel blast doors, one third of a mile inside the mountain, guard the heart of NORAD’s Cheyenne Mountain Operations Center (CMOC) and are intended to seal the complex to protect it from a nuclear strike. The doors are three feet thick, more than 10 feet high, and each weigh 25 tons. During an attack, they can swing shut in 30 to 40 seconds. [Airman, 1/1996; Nation, 5/5/2008; Colorado Springs Gazette, 5/10/2008]
Doors Are Shut for the First Time, except for Exercises - Air Force officer William Astore will later recall that when he worked inside Cheyenne Mountain between 1985 and 1988, the blast doors were kept open, “except, of course, during ‘exercises,’ when the mountain ‘buttoned up’ its self-contained world.” [Nation, 5/5/2008] Now is the first time since the CMOC opened in 1966 that the blast doors have been shut because of a real-world, non-exercise event. Lieutenant Colonel Steven Armstrong, NORAD’s chief of plans and forces, who is in the CMOC on this day, will later comment, “The fact that we closed the blast doors… was a significant event.” [Toronto Star, 12/9/2001; Colorado Springs Gazette, 6/14/2004; North American Aerospace Defense Command, 9/9/2011]
Accounts Conflict over Why the Doors Are Closed - The reason the blast doors are shut is unclear. According to the Toronto Star, they are closed because “no one yet knew who was behind the attack—or what else might be en route.” [Toronto Star, 12/9/2001] But Aviation Week and Space Technology magazine will report that “NORAD commanders ordered [the] massive steel doors be closed” after “someone—possibly President Bush—ordered the military to a Force Protection Condition Delta wartime posture” (see (Between 10:10 a.m. and 10:35 a.m.) September 11, 2001). [Aviation Week and Space Technology, 6/3/2002] Other reports will say the doors are shut due to a report the CMOC received about an aircraft that is incorrectly suspected of being hijacked and targeting Cheyenne Mountain (see (10:10 a.m.) September 11, 2001). [BBC, 9/1/2002; Grant, 2004, pp. 26; Colorado Springs Gazette, 6/14/2004; Washington Post, 7/29/2006] A NORAD representative on the Pentagon’s air threat conference call will report over the conference call that the blast doors are in fact shut in response to information received at the CMOC about a number of suspicious trucks that are supposedly heading toward the CMOC (see (Shortly After 1:05 p.m.) September 11, 2001). [US Department of Defense, 9/11/2001]
Doors Are Re-Opened Four Hours Later - The blast doors will be re-opened four hours after they are shut, “when officials learned the threat was bogus,” according to the Colorado Springs Gazette. [Colorado Springs Gazette, 6/14/2004]

Defense Secretary Donald Rumsfeld, missing for at least 30 minutes, finally enters the NMCC, where the military’s response to the 9/11 attacks is being coordinated. [CNN, 9/4/2002; 9/11 Commission, 6/17/2004] Rumsfeld later claims that he only started to gain a situational awareness of what was happening after arriving at the NMCC. [9/11 Commission, 6/17/2004] Rumsfeld was in his office only 200 feet away from the NMCC until the Pentagon crash at 9:37 a.m. (see 9:37 a.m. September 11, 2001). His activities during this period are unclear. He went outside to the Flight 77 crash site and then stayed somewhere else in the Pentagon until his arrival at the NMCC. Brigadier General Montague Winfield later says, “For 30 minutes we couldn’t find him. And just as we began to worry, he walked into the door of the [NMCC].” [ABC News, 9/11/2002] Winfield himself apparently only shows up at the NMCC around 10:30 a.m. as well.

The Continental United States NORAD Region (CONR) issues a message to its three air defense sectors—including the Northeast Air Defense Sector (NEADS)—stating that Vice President Dick Cheney has authorized it to shoot down suspicious aircraft.
Order Sent over Computer Chat System - About 15 minutes earlier, a military officer at the White House relayed to the Pentagon’s National Military Command Center (NMCC) that Cheney had confirmed that fighter jets were cleared to engage an inbound aircraft if they could verify that the aircraft was hijacked (see 10:14 a.m.-10:19 a.m. September 11, 2001). According to the 9/11 Commission, “It is not clear how [this] shootdown order was communicated within NORAD.” However, Major General Larry Arnold, the CONR commander, now instructs his staff to broadcast a message over a NORAD computer chat system, passing on Cheney’s authorization. The message states, “10:31 Vice president has cleared to us to intercept tracks of interest and shoot them down if they do not respond, per CONR CC [General Arnold].” The message is received at CONR’s three air defense sectors: the Western, Southeast, and Northeast. [9/11 Commission, 7/24/2004, pp. 42; Spencer, 2008, pp. 240]
Arnold Could Issue Shootdown Order Himself - Arnold, who is at the CONR air operations center at Tyndall Air Force Base in Florida, will later comment, “I have the authority in case of an emergency to declare a target hostile and shoot it down under an emergency condition… but it was comforting to know we legally had the authority from the president of the United States.” [Filson, 2002; Code One Magazine, 1/2002; Filson, 2003, pp. 75-76] The 10:31 chat message is the first notification personnel on the NEADS operations floor receive of the shootdown order. These personnel are reportedly confused over the order and do not pass it on to fighter pilots under their command (see 10:32 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 42-43; 9/11 Commission, 8/26/2004, pp. 47]

The US military’s defense readiness condition is raised from Defcon 5, the lowest possible level, to Defcon 3, an intermediate level that requires a heightened alert status for US armed forces worldwide, and which is the highest the defense readiness condition has been for 28 years. [Historical Office, Office of the Secretary of Defense, 7/18/2002; 9/11 Commission, 7/24/2004, pp. 326, 554; Goldberg et al., 2007, pp. 131; Rumsfeld, 2011, pp. 338]
Rumsfeld Recommends Raising Defcon - The decision to go to Defcon 3 is reportedly made by Secretary of Defense Donald Rumsfeld. [US Department of Defense, 8/12/2002] Rumsfeld will later recall that after he arrives at the Pentagon’s National Military Command Center (NMCC) (see (10:30 a.m.) September 11, 2001), he talks with General Richard Myers, the vice chairman of the Joint Chiefs of Staff, and “[w]e discussed and I recommended raising the defense condition level from five to three.” [9/11 Commission, 3/23/2004]
Teleconference Participants Told to 'Hold Off' on Defcon 3 - Rumsfeld directs that the US military go to Defcon 3. At 10:43 a.m., it is announced on the air threat conference call that the secretary of defense “has directed that we go to Defcon 3 and be prepared to go to [Defcon] 2.” However, a minute later, Rumsfeld talks to Vice President Dick Cheney on the conference call, and Cheney says he will have to run the decision to go to Defcon 3 by the president, “and let him make the call.” Therefore, at 10:45 a.m., those on the conference call are told to “hold off on Defcon 3.”
Order to Raise Defcon Reinstated - But Rumsfeld believes raising the defense readiness condition is urgent. [US Department of Defense, 9/11/2001 ; 9/11 Commission, 7/24/2004, pp. 326, 554] There is therefore a “historical discussion about how the move to Defcon 3 went during previous crises, Cuba specifically [i.e. the Cuban missile crisis in 1962],” Captain Charles Leidig, who is also in the NMCC, will later recall. With their reference being “a book on the shelf,” according to Leidig, Myers is shown that he has “approval authority to go to Defcon 3.” [9/11 Commission, 4/29/2004 ] After consulting Defense Department directives, Rumsfeld concludes that he has the authority to issue the order to raise the defense readiness condition. [9/11 Commission, 7/24/2004, pp. 554] Therefore, at 10:46 a.m., those on the air threat conference call are told: “Override last instructions. The vice chairman [i.e. Myers] is directing we go to Defcon 3.” A few minutes later, an announcement is made on the conference call, “Emergency action message released at 14:52 [Zulu time, i.e. 10:52 a.m. Eastern time], re: Defcon 3.” [US Department of Defense, 9/11/2001 ; 9/11 Commission, 2004]
Raising Defcon Is a 'Huge Move' - Rumsfeld will later agree with an interviewer that raising the defense readiness condition is “a very serious step for the nation.” [US Department of Defense, 8/12/2002] It was last raised to Defcon 3 during the 1973 Arab-Israeli war, when Rumsfeld had been the United States ambassador to NATO. Regarding the decision to raise it, Myers tells Rumsfeld, “It’s a huge move, but it’s appropriate.” [US Department of Defense, 1/9/2002; Wall Street Journal, 3/22/2004; Rumsfeld, 2011, pp. 338]
President Later Told of Decision - The decision to go to Defcon 3 will soon be communicated within NORAD (see 11:03 a.m.-11:12 a.m. September11, 2001). [9/11 Commission, 6/17/2003; 9/11 Commission, 2004; 9/11 Commission, 2/3/2004 ] Rumsfeld will brief President Bush on the decision (see (11:15 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 554; Bush, 2010, pp. 133] Apparently around the time the defense readiness condition is raised, Rumsfeld and/or Myers also decide to raise the force protection condition of US military installations (see (Between 10:10 a.m. and 10:35 a.m.) September 11, 2001). [US Department of Defense, 9/11/2001 ; 9/11 Commission, 3/23/2004; Myers, 2009, pp. 153]
Defcon 3 Intended for Cold War - Some individuals will later be critical of the decision to raise the defense readiness condition at this time. John Farmer, the senior counsel to the 9/11 Commission, will write that Defcon 3 is in fact “a Cold War-era designation, devised to respond to a nuclear threat.” [Farmer, 2009, pp. 235] According to Farmer and other 9/11 Commission staffers, it is “suited more to a Cold War conflict than to al-Qaeda’s attack.” [Rutgers Law Review, 9/7/2011 ] General Ralph Eberhart, the commander of NORAD, will similarly say that Defcon 3 is “not intended for [events like] the attacks of 9/11 and thus could have complicated the response to the attacks.” He will say he does not think that raising the condition would have “done anything for us” within the continental United States. [9/11 Commission, 3/1/2004 ]
Defcons Are Phased Increases in Combat Readiness - The defense readiness condition is a “uniform system of progressive alert postures for use between the chairman of the Joint Chiefs of Staff and the commanders of unified and specified commands, and for use by the [armed] services,” according to the Department of Defense. [US Department of Defense, 11/8/2011 ] Defcons are phased increases in combat readiness and are graduated to match situations of varying military severity. They are numbered, from Defcon 5, which means “normal peacetime readiness,” down to Defcon 1, which means “maximum force readiness.” The current level, Defcon 3, represents an “increase in force readiness above normal readiness.” [Federation of American Scientists, 4/29/1998] The defense readiness condition will remain at Defcon 3 until three days later, when it will be reduced one notch, to Defcon 4 (see September 14, 2001). [Washington Post, 1/30/2002]

Russian President Vladimir Putin phones President Bush while he is aboard Air Force One. Putin is the first foreign leader to call Bush following the attacks. He earlier called the White House to speak with the president, but had to speak with Condoleezza Rice instead (see Between 10:32 a.m. and 11:45 a.m. September 11, 2001). Putin tells Bush he recognizes that the US has put troops on alert, and makes it clear that he will stand down Russian troops. US forces were ordered to high alert some time between 10:10 and 10:46 a.m. (see (Between 10:10 a.m. and 10:35 a.m.) September 11, 2001) Bush later describes, “In the past… had the President put the—raised the DEF CON levels of our troops, Russia would have responded accordingly. There would have been inevitable tension.” Bush therefore describes this phone call as “a moment where it clearly said to me, [President Putin] understands the Cold War is over.” [US President, 10/1/2001; US President, 11/19/2001; CNN, 9/10/2002] Putin also sends a telegram to Bush today, stating: “The series of barbaric terrorist acts, directed against innocent people, has evoked our anger and indignation.… The whole international community must rally in the fight against terrorism.” [Russian Embassy, 9/17/2001]

Logan Walters. [Source: SCF Partners]While he is at Barksdale Air Force Base in Louisiana, President Bush receives an intelligence report from the US Strategic Command (Stratcom), informing him that a high-speed object is heading for his ranch in Crawford, Texas. It is already more than 45 minutes since US airspace had been cleared of all aircraft except military and emergency flights (see 12:16 p.m. September 11, 2001). Bush orders an underling to notify everyone at the ranch about this. [New Yorker, 9/25/2001; Sammon, 2002, pp. 117; CBS News, 9/11/2002] In the White House Situation Room, they are also informed of the rogue aircraft. Logan Walters, who is Bush’s personal aide, calls the ranch’s caretaker and tells him, “Get as far away from there as you can.” Senior national security official Franklin Miller then receives a phone call informing him that a combat air patrol (CAP) has been established over the ranch. [Draper, 2007, pp. 142] (A CAP is an aircraft patrol with the purpose of intercepting and destroying hostile aircraft before they reach their targets. [US Department of Defense, 4/12/2001] ) Miller heads to the Presidential Emergency Operations Center (PEOC) below the White House to ask Deputy National Security Adviser Stephen Hadley about the CAP. Both men agree that it seems unnecessarily excessive. When Miller returns to the Situation Room, he sets about calling off the CAP, but finds that it wasn’t even established to begin with, and that, furthermore, the report of a rogue aircraft was a false alarm. [Draper, 2007, pp. 143] A threat to Air Force One had allegedly been received earlier on (see (10:32 a.m.) September 11, 2001), but this too is later deemed to have been a false alarm. [9/11 Commission, 7/24/2004, pp. 554]

A Ryder truck. [Source: Ryder]Personnel in NORAD’s Cheyenne Mountain Operations Center (CMOC) in Colorado are informed that a truck, or a number of trucks, carrying men who appear to be Arabs is heading up the mountain toward the CMOC, but the apparent threat will turn out to be a false alarm. [US Department of Defense, 9/11/2001; Aviation Week and Space Technology, 6/3/2002; BBC, 9/1/2002] A NORAD representative describes what CMOC personnel are told over the Pentagon’s air threat conference call, saying, “We just received some intel that eight Ryder vans may be en route to the Cheyenne Mountain complex.” [US Department of Defense, 9/11/2001] According to some accounts, though, only one vehicle—not eight—is reportedly heading toward the CMOC and this is carrying a number of Arab-looking men. CMOC personnel receive “an input that there [is] a yellow transport truck coming up the hill with seven Islamic folks in the front cab,” Lieutenant Colonel William Glover, the commander of NORAD’s Air Warning Center, will later recall. [BBC, 9/1/2002] According to Aviation Week and Space Technology magazine, there is a “rumor” going around the CMOC about a “Ryder rental truck full of explosives,” driven by “Arab-looking men,” that is “targeting the mountain.” [Aviation Week and Space Technology, 6/3/2002] The source of the information about the truck, or trucks, supposedly approaching the CMOC is unstated.
Blast Doors Are Reportedly Shut due to the Threat - The massive blast doors leading to the CMOC are closed in response to this apparent threat, according to the NORAD representative on the air threat conference call (see (10:15 a.m.) September 11, 2001). He says over the conference call, “Cheyenne Mountain is closing [the] blast doors in response to [a] possible threat of eight Ryder trucks en route from downtown to the Cheyenne Mountain complex.”
Threat Is a False Alarm - The supposed threat will turn out to be a false alarm. The NORAD representative will later report over the conference call: “I previously briefed [about a] possible eight Ryder trucks en route to Cheyenne Mountain. That threat has been negated. That is no longer a threat.” He will be asked if the report about the trucks was “an accurate assessment” or if someone had to “neutralize the force,” presumably meaning military action had to be taken against the trucks. The NORAD representative will answer simply, “We have no more details at this time.” It is unclear when CMOC personnel are alerted to the truck, or trucks, that is supposedly heading their way. The NORAD representative on the air threat conference call first mentions the trucks shortly after he reported that an unidentified aircraft had been spotted flying toward President Bush’s ranch in Crawford, Texas. [US Department of Defense, 9/11/2001] Bush was told about this aircraft at 1:05 p.m. (see 1:05 p.m. September 11, 2001), which was presumably around the time that NORAD was alerted to it. [New Yorker, 9/25/2001; Sammon, 2002, pp. 117] CMOC personnel presumably therefore learn about the truck, or trucks, supposedly heading their way shortly after 1:05 p.m.