9/11: What the Primary Record Shows

Before the Attacks: What Was Known

The documented record of pre-attack intelligence is more specific than is typically acknowledged. Three separate intelligence threads — the Phoenix Memo, the Presidential Daily Brief, and the Able Danger program — reached senior levels of the U.S. government in the 14 months before the attacks. None triggered action that disrupted the plot.

The Phoenix Memo — July 10, 2001

FBI Special Agent Kenneth Williams, based in the Phoenix field office, sent a memo to FBI headquarters on July 10, 2001 — 58 days before the attacks. The memo warned that a suspicious number of individuals who appeared to have possible links to Osama bin Laden were enrolled in civil aviation universities and flight schools in Arizona. Williams recommended that FBI headquarters contact all civil aviation schools and request information about any Middle Eastern students enrolled there.

The memo was sent to the Osama bin Laden unit and the Radical Fundamentalist Unit at headquarters. According to the Joint Congressional Inquiry, the memo was not distributed widely. It was not shared with the CIA, NSA, or other agencies. No action was taken on Williams’s recommendation before the attacks.

The Presidential Daily Brief — August 6, 2001

On August 6, 2001 — 36 days before the attacks — President Bush received a Presidential Daily Brief at his Crawford, Texas ranch. The brief was titled: “Bin Ladin Determined To Strike in US.”

The brief stated that al-Qaeda members had been in the United States since at least 1997 and that the FBI had detected “patterns of suspicious activity in this country consistent with preparations for hijackings or other types of attacks.” The brief also noted that al-Qaeda had “wanted to conduct terrorist operations in the United States” since 1997 and referenced “a 70-person FBI investigation into al-Qaida in the United States.”

The PDB remained classified until Condoleezza Rice testified before the Commission in April 2004 and commission members pressed for its release. It was declassified and released the same day. At the time of its delivery, Bush had been on vacation at Crawford for approximately one month. He returned to Washington on September 3.

Able Danger — Pentagon Intelligence Program, 2000

Able Danger was a classified data-mining and intelligence program run by the U.S. Army’s Special Operations Command beginning in October 1999. The program was designed to map al-Qaeda’s global network using open-source and classified intelligence. According to Lieutenant Colonel Anthony Shaffer and Congressman Curt Weldon (R-PA), who disclosed the program publicly in 2005, Able Danger identified Mohamed Atta and three other future hijackers in mid-2000 as members of an al-Qaeda cell they called the “Brooklyn cell.”

According to Shaffer, the team recommended that this information be forwarded to the FBI so the cell could be targeted. Government lawyers — Shaffer was uncertain whether they were from the Department of Defense or the White House — declined, citing Atta’s legal visa status. The lawyers reportedly cited concerns about the domestic legal implications of military intelligence on U.S. soil in the aftermath of the Waco incident. Congressman Weldon stated before the House in June 2005: “we are fearful of the fallout from the Waco incident. So we did not allow that Federal agency to proceed.”

The Mossad Warning — August 23, 2001

On August 23, 2001 — 19 days before the attacks — Israeli intelligence (Mossad) provided the CIA with a list of 19 names it characterized as U.S. residents suspected of planning an imminent attack against the United States. Among the 19 were Mohamed Atta and three of the other hijackers — Marwan al-Shehhi, Nawaf al-Hazmi, and Khalid al-Mihdhar. The list’s full contents and the precise communication with the CIA have not been fully declassified. The existence and the four confirmed names are documented in the public record via court documents and published reporting.

The Day: NORAD’s Four Timelines

The official account of military response on September 11 went through four distinct and contradictory versions over three years. The 9/11 Commission’s own staff concluded that the discrepancies in NORAD’s testimony were potentially “a deliberate effort to mislead the commission and the public rather than a reflection of the fog of events on that day.”

The Commission’s staff review, reported by the Washington Post on August 3, 2006, documented that some staff and commissioners believed the Pentagon’s evolving accounts “may have been part of a deliberate effort to mislead.” No criminal referral was made. Commission co-chair Thomas Kean stated publicly: “We to this day don’t know why NORAD told us what they told us. It was just so far from the truth. It’s one of those loose ends that never got tied.”

War Games Running on September 11

The September 11 attacks occurred during Vigilant Guardian, one of NORAD’s annual joint exercises with the U.S. and Canadian militaries. The 9/11 Commission Report stated that Vigilant Guardian “postulated a bomber attack from the former Soviet Union.” However, a 2004 USA Today report — “NORAD had drills of jets as weapons” — documented that in the two years before 9/11, NORAD had conducted exercises that simulated hijacked airliners being used as weapons to crash into targets, including the World Trade Center. The Commission stated plainly that using hijacked aircraft as guided missiles “was not recognized by NORAD before 9/11.” The USA Today report contradicts that specific claim.

The 28 Pages: Saudi Government Connections

The Joint Congressional Inquiry into 9/11 produced a final report in December 2002. Twenty-eight pages were classified in their entirety by the Bush administration. They remained classified for 14 years and were released in July 2016. The pages document specific connections between Saudi government employees and at least two of the hijackers who settled in San Diego prior to the attacks.

The FBI Documents — 2021 to 2022

Beginning in 2021, families of 9/11 victims sued Saudi Arabia in federal court. The Department of Justice initially argued that disclosing FBI documents about Saudi government connections would harm national security. Under public and legal pressure, President Biden ordered a declassification review. The FBI released documents between 2021 and 2022 providing additional detail on the Saudi connections documented in the 28 pages.

The documents confirmed that al-Bayoumi was assessed by the FBI as an “agent” of Saudi intelligence — going beyond the “possible” language of the 28 pages. The documents also detailed the sequence: al-Bayoumi called the Saudi consulate, then met the hijackers — a sequence that, in the FBI’s assessment, was not coincidental.

The Commission’s Own Assessment of Itself

Thomas Kean and Lee Hamilton — the Republican and Democratic co-chairs of the 9/11 Commission — published Without Precedent: The Inside Story of the 9/11 Commission in 2006. The book documented, in the co-chairs’ own words, the conditions under which the Commission operated.

Building 7: The Unprecedented Collapse

World Trade Center Building 7 was a 47-story steel-frame skyscraper located approximately 350 feet north of the North Tower. It was not struck by an aircraft. No jet fuel burned in it. At 5:20 PM on September 11, 2001, it collapsed into its own footprint in under seven seconds. This was the first time in modern construction history that a steel-frame high-rise had collapsed due to fire alone. It has not happened since.

What NIST Did Not Release

NIST denied multiple Freedom of Information Act requests for the detailed computer models and data underlying its Building 7 conclusion on the grounds that releasing the data “might jeopardize public safety.” A federal court upheld NIST’s withholding of certain model data. Structural engineers have noted that without access to the underlying model, the conclusion cannot be independently verified.

NIST also confirmed in its report that it found no evidence of controlled demolition. It stated explicitly that it found no evidence of explosives residue. However, it acknowledged it did not test for nanothermite or other advanced incendiary materials, and that the “investigation team was not asked to determine the cause of collapse for each particular structural element.”

The Media Reports Before the Collapse

At approximately 4:57 PM on September 11, BBC correspondent Jane Standley reported on air that Building 7 had collapsed — while the building was still standing visibly in the frame behind her. CNN also reported the building’s collapse before it occurred. Both networks attributed the early reports to news wire services. The origin of the wire report has never been conclusively documented. The BBC acknowledged the error but stated it did not imply foreknowledge.

The Saudi Flights — September 13, 2001

On September 13, 2001 — while U.S. civilian airspace was still under severe restrictions following 9/11 — Saudi nationals were authorized to fly out of the United States. The flights, which ultimately carried approximately 140 Saudi nationals including members of the bin Laden family and Saudi royal family members, departed from multiple cities and were consolidated before departing the country.

Richard Clarke, the White House counterterrorism coordinator, wrote in his 2004 book Against All Enemies that he approved the flights at “the federal level” — and that he now believed in retrospect it had been a mistake. Clarke acknowledged the decision was made quickly and without adequate review of who was aboard the flights. The FBI stated it interviewed 30 of the individuals before their departure, though this has been disputed as inadequate given the circumstances.

The 9/11 Commission examined the Saudi flights and concluded they did not violate airspace restrictions because private aviation had been cleared before the flights occurred. The Commission’s conclusion has been contested by researchers including Craig Unger, whose book House of Bush, House of Saud documented the flights in detail.

The Aftermath: What the Attacks Authorized

On September 18, 2001 — seven days after the attacks — Congress passed the Authorization for Use of Military Force (AUMF). The AUMF authorized the President to use “all necessary and appropriate force” against those responsible for 9/11. It passed 420–1 in the House and 98–0 in the Senate. Representative Barbara Lee (D-CA) cast the only dissenting vote. It remains in effect as of 2026 and has been used as legal authorization for military operations in more than a dozen countries.

The USA PATRIOT Act was signed into law on October 26, 2001 — 45 days after the attacks. It dramatically expanded surveillance authorities, including warrantless searches, roving wiretaps, and access to business records. The NSA bulk telephone metadata collection program — later revealed by Edward Snowden in 2013 — was one downstream product. The Foreign Intelligence Surveillance Court (FISA) approved the program in secret. When the program became public, the court’s approvals were described by several federal judges as having exceeded statutory authority.

The Iraq War began March 20, 2003. The stated justification was that Iraq possessed weapons of mass destruction. No such weapons were found. The Senate Intelligence Committee concluded in 2004 that the intelligence assessments underlying the decision were “not supported by the underlying intelligence reporting.” The connection between 9/11 and Iraq — stated or implied in administration communications before and after the invasion — was explicitly rejected by the 9/11 Commission, which found “no credible evidence” of a collaborative operational relationship between Iraq and al-Qaeda.