U.S. military response during the September 11 attacks

On taking control of the airliners, the hijackers of the four planes switched off the transponders or changed their codes, making it difficult to track them on radar. Northeast Air Defense Sector (NEADS) / NORAD personnel stated they had trouble identifying and tracking the aircraft, succeeding only sometimes: • NEADS technicians spotted Flight 11 twenty miles north of Manhattan, two or three minutes before it crashed into the north tower of the World Trade Center. ==Flight 11==

At 08:13, the pilots of Flight 11 responded to an instruction to turn 20 degrees to the right issued from Boston Center. A few seconds later, Boston Center instructed the pilots to ascend in altitude to which there was no response. Multiple attempts to contact the flight went unanswered and as it became apparent that Flight 11 began to pose an air hazard, air traffic controllers began to reroute arriving aircraft for adequate separation. Boston Center flight controller Tom Roberts said "We had pretty much moved all the airplanes from Albany, New York to Syracuse, New York out of the way because that's the track he was going on.'" At 08:19, Betty Ong, a flight attendant on Flight 11, called the American Airlines reservation desk to report that the flight was hijacked. At 08:21, Flight 11 stopped transmitting its transponder information concerning its altitude or identification. At 08:24, the controller heard what he believed was the voice of a hijacker (believed to be Mohamed Atta) in a radio transmission from Flight 11. Two minutes later, the plane veered off course and turned south near Albany, New York. The Boston Center called the FAA Command Center at Herndon at 08:28 to report the hijacking. At 08:32, Herndon called FAA Headquarters in Washington. At 08:34, Boston Center contacted Otis Air National Guard (ANG) base to notify them of the hijacking. The controller at Otis directed Boston to contact NORAD's Northeast Air Defense Sector (NEADS), and then informed the Otis Operations Center to expect a call from NEADS ordering a scramble. At this time two pilots began to suit up and drove to their waiting F-15 fighter jets. At 08:37, Boston Center contacted NEADS in Rome, New York. This was the first report of a hijacking that reached NORAD. At that time, NEADS personnel were still trying to pinpoint the location of Flight 11, but since the plane had already struck the North Tower, they were unable to. Without having a specific target located, military commanders were uncertain where to send the fighters. Boston Center controllers were still tracking Flight 11 as a primary target but were unable to communicate its location to NEADS by phone. After news of an aircraft hitting the World Trade Center began spreading, no decision was made to alter the course of the F-15s of the 102nd Fighter Wing. Duffy, would later state he had already heard about the suspected hijacking (attributed to a phone call from the FAA's Boston Center) as he was supervising training exercises at Otis ANG base. The fighters were then ordered in a holding pattern off the coast of Long Island (in military-controlled airspace), where they remained from 09:09 to 09:13. After the airspace was cleared, the Otis fighters were directed towards Manhattan, where they arrived at 09:25 and established a combat air patrol (CAP). The 9/11 Commission report stated the Boston center tried to contact a former alert site in New Jersey, but it had been phased out. The report stated there were only seven "alert" sites (sites which had a pair of aircraft armed and on hand) in the United States by 9/11 and just two in the Northeast Air Defense Sector—Otis Air National Guard base in Massachusetts and Langley Air Force Base in Virginia. ==Flight 175==

United Airlines Flight 175 departed Logan Airport at 08:14 also bound for Los Angeles just like Flight 11. At 08:42, when Flight 175's pilots sent their last radio transmission, the aircraft's transponder was at that time transmitting the assigned code. Five minutes later, the transponder code changed twice, the first indication that the plane had been hijacked, although air traffic controllers would not notice for several more minutes. As word began spreading about the hijacking of Flight 11, air traffic controller David Bottiglia and other controllers searched the radar, looking for Flight 11. At 08:51, he noticed that Flight 175 had changed its transponder. He asked another controller to take over all of his other planes. At 08:55, Bottiglia told a manager at FAA New York Center that he thought Flight 175 had been hijacked. According to the 9/11 Commission report, this manager then "tried to contact regional managers but was told that they were discussing hijacked aircraft (presumably Flight 11) and refused to be disturbed." At 09:01, a New York Center manager called FAA Command Center at Herndon. NEADS was notified at 09:03, when the New York Center manager called them directly, at about the time that Flight 175 hit the South Tower. The F-15s were still 20 minutes away from Manhattan when United Airlines Flight 175 impacted the WTC's south tower. Although NORAD knew of no other hijacked aircraft, a precautionary measure was taken by ordering fighters at Langley Air Force Base to battle stations. ==Phantom Flight 11==

At 09:21, NEADS received another call from Colin Scoggins, who reported erroneously that Flight 11 was not, in fact, the aircraft that hit the North Tower at 08:46, as had been previously believed, but that it was still in the air and heading towards Washington. NEADS responded to this report by giving a scramble order to three fighters from the 119th Fighter Wing on alert at Langley Air Force Base at 09:24, and by 9:30 they were in the air. According to the 9/11 commission, the Langley pilots were never briefed by anyone at their base about why they were being scrambled, so, despite Langley officials' having been given the order from NEADS to fly to Washington, the unbriefed pilots ended up following their normal training flight plan, due east, out to sea. The fighters then flew north-west towards Washington, arriving around 10:00. ==Flight 77==

American Airlines Flight 77 took off from Dulles International Airport outside Washington D.C. at 08:20. The last transmission from the flight took place at 08:50:51. The flight proceeded normally until 08:54, when the aircraft deviated from its assigned course by initiating a turn to the south. Two minutes later, at 08:56, the plane's transponder was switched off, and its primary radar track was lost. Later, after hearing about the hijacked planes hitting the World Trade Center, Indianapolis Center suspected that Flight 77 may also have been hijacked, and shared this information with FAA Command Center at Herndon, where staff contacted FAA Headquarters in Washington at 09:25. NEADS learned that the flight was lost at 9:34 during a phone call with the FAA Headquarters. Washington Center: Now let me tell you this. I – I'll – we've been looking. We're – also lost American 77 ... They lost contact with him. They lost everything. And they don't have any idea where he is or what happened. The FAA did not contact NEADS to make this report. This phone call was initiated by NEADS in an attempt to locate Phantom Flight 11 (see previous). At 09:35, Colin Scoggins from the FAA's Boston Center again called NEADS to inform them that they had located an aircraft, which later turned out to be Flight 77, heading toward Washington D.C. at a high speed. Two minutes later, a NEADS radar technician spotted a target he believed to be Flight 77. This radar target was in fact Flight 77, but the target vanished as soon as it was discovered. NEADS officials urgently ordered the fighters from Langley to be sent to Washington immediately, but the plane struck the Pentagon at 09:37:46. The Langley fighters were still 150 miles away. ==Flight 93==

At 09:28, FAA Cleveland Center controller John Werth heard "sounds of possible screaming" coming from Flight 93 and noticed that the plane had descended 700 feet. At the time, Werth knew that some passenger jets were missing and that one had hit the World Trade Center in New York. At 09:32, he heard a voice saying "We have a bomb on board" and told his supervisor who then notified FAA Headquarters. At 09:36, FAA Cleveland called FAA Command Center at Herndon to ask whether the military had been notified – FAA Command Center told Cleveland that "FAA personnel well above them in the chain of command had to make the decision to seek military assistance and were working on the issue". At 09:49, the decision about whether to call the military had still not been made, and no one from the FAA called NEADS until 10:07, four minutes after Flight 93 had crashed near Shanksville, PA. Werth later commented: Within three or four minutes, probably, of when it happened, I asked if the military was advised yet. Had anybody called the military? They said, "don't worry, that's been taken care of," which I think to them meant they had called the command center in Washington. Dennis Fritz, director of the municipal airport in Johnstown, Pa., said the FAA called him several times as the plane approached his city, and even warned him to evacuate the tower for fear the jet would crash into it. Had Flight 93 made it to Washington, D.C., Air National Guard pilots Lieutenant Colonel Marc H. Sasseville and Lieutenant Heather "Lucky" Penney were prepared to ram their unarmed F-16 fighters into it, perhaps giving their lives in the process. ==NORAD timeline==

On September 18, 2001, NORAD issued a press release containing a timeline of the events of the September 11, including when they were contacted by the FAA. However, in 2004, the 9/11 Commission, after listening to tapes of communications, found that portions of this timeline were inaccurate. and was given in testimony to the 9/11 Commission by NORAD's Major General Larry Arnold (retired), and Colonel Alan Scott (retired) in 2003. The Washington Post reported in its August 3, 2006, edition that: In their 2007 book, Without Precedent, 9/11 Commission chairmen Thomas Kean and Lee H. Hamilton wrote that 9/11 conspiracy theories had grown primarily because of problems in the previous story about the planes: The NORAD timeline showed that the FAA had notified NORAD earlier than the taped evidence indicated, and the 9/11 Commission Report faulted the FAA for not contacting NORAD quickly enough. The NORAD timeline showed notification of the hijacking of Flight 175 at 08:43, while the tapes show NORAD was notified at the same time Flight 175 hit the South Tower at 09:03. According to Scoggins, however, "With American Airlines, we could never confirm if [Flight 11] was down or not, so that left doubt in our minds." Several Boston controllers tracked American 11 for its entire flight. The FAA mistakenly thought Flight 11 was still possibly airborne, in part because American Airlines did not confirm that they had lost all contact with Flight 11 until some time after 10:00. The NORAD timeline showed that the fighters scrambled from Langley at 09:24 were in response to a 09:21 FAA report of the hijacking of Flight 77; NORAD never mentioned the phantom Flight 11. In October 2003, the 9/11 Commission issued a subpoena to the FAA to turn over documents after the commission's investigators determined that material had been withheld. A tape was made of oral statements of New York air traffic controllers, intended to be used as an aid in their making written statements, then destroyed. A quality assurance manager at the FAA's New York Center denied the staff access to the tape and later destroyed it. Its existence came to light in 2003 interviews with FAA staff. The Commission subpoenaed the tape and other records from the FAA on Oct. 16, 2003. In November 2003, the Commission issued a subpoena to NORAD; its second subpoena issued to a federal agency for failure to turn over documents. In July 2004, the 9/11 Commission made referrals to the Inspectors General of both the US Department of Transportation and the Defense Department to further investigate whether witnesses had lied. The DoD Inspector General's report was released to the New York Times in August 2006 under a FOIA request. According to the report, military officials were exonerated of intentionally misleading the 9/11 Commission in their testimony. A summary of the report called for more steps to improve the Defense Department's ability to investigate "a future significant air event," including more effective event logging methods The US Transportation Department's Inspector General's investigation report was released on August 31, 2006. FAA personnel were also exonerated of knowingly misleading the 9/11 Commission. ==Air Sovereignty Alert (ASA) preparedness==

Background In January 1982, the FAA unveiled the National Airspace System (NAS) Plan. The plan called for more advanced systems for Air Traffic Control, and improvements in ground-to-air surveillance and communication with new Doppler Radars and better transponders. Better computers and software were developed, air route traffic control centers were consolidated, and the number of flight service stations reduced. There is no overlap of responsibility between DoD and FAA within the NAS: this is why within FAA-controlled airspace the FAA is in charge of controlling and vectoring hijack intercept aircraft. Planning for terrorist use of hijacked airplanes as missiles had been considered for some military exercises prior to 9/11, though all but one of those exercises considered only aircraft originating from other countries. The US and Canadian militaries, particularly NORAD and the US Air National Guard, have been tasked with interception duties concerning hijacked aircraft. Their primary duty was assistance to law enforcement. Quoting Maj. Gen. Larry Arnold: "We always viewed an attack from within our borders as a law enforcement issue, ...". Military aircraft were to be used to assure positive flight following, report unusual observances, and aid search and rescue in the event of an emergency. However, in January 2002 Maj.Gen. Larry Arnold, stated: "...we did not honestly think about hijacked airliners being used in suicide attacks." Later systems, such as the Joint-Based Expeditionary Connectivity Center (JBECC), merge civil and military radar data. Once deployed, the JBECC can fuse and correlate target data covering about 400 miles (640 km) of coastline from disparate airborne, land- and sea-based sensors creating fire-control-quality tracks that can guide interceptors to engagement. Major General Larry Arnold, USAF, ret. stated in May 2001, that JBECC will provide "... more time to scramble fighters and see any target, whether small, large, low or high." General Arnold also stated "In the immediate aftermath of 9/11 we had to hook up to FAA radars throughout the country, install compatible radios for nationwide coverage between our command and control agencies and our airborne assets, and purchase a new command and control computer system to integrate radar and communications. The initial investment was for $75 million, and this number has grown to nearly $200 million." 2009 Government Accountability Office report on ASA In January 2009, the Government Accountability Office (GAO) published "Homeland Defense: Actions Needed to Improve Management of Air Sovereignty Alert Operations to Protect U.S. Airspace" on the Air Force's Air Sovereignty Alert mission. According to the report: The Air Force has not implemented ASA operations in accordance with DOD, NORAD, and Air Force directives and guidance, which instruct the Air Force to establish ASA as a steady-state (ongoing and indefinite) mission. The Air Force has not implemented the 140 actions it identified to establish ASA as a steady-state mission, which included integrating ASA operations into the Air Force's planning, programming, and funding cycle. The Air Force has instead been focused on other priorities, such as overseas military operations. While implementing ASA as a steady-state mission would not solve all of the challenges the units must address, it would help them mitigate some of the challenges associated with conducting both their ASA and warfighting missions. The report further stated: The GAO analysis also showed that none of the Air Force's key homeland defense documents—the Air Force homeland defense policy directive, the Air Force homeland operations doctrine, and the Air Force homeland defense concept of operations—fully defines the roles and responsibilities for, or accurately articulates the complexity of, Air Sovereignty Alert operations. The report made the following recommendations to improve ASA operations: ==See also==