On the 25th anniversary of the September 11 attacks, the Central Intelligence Agency released 71 declassified President’s Daily Brief (PDB) products spanning from February 1998 to September 12, 2001. The release — described by CIA Director John Ratcliffe as the agency’s single largest declassification of PDB materials related to 9/11 — offers an unprecedented window into what America’s most senior intelligence analysts knew, and what they told the nation’s leaders, in the years and months before nearly 3,000 people were killed in the deadliest terrorist attack in American history.

The Scope of the Release

Director Ratcliffe framed the declassification as consistent with President Donald Trump’s broader transparency initiative, calling it “an act of exceptional transparency” in commemoration of the anniversary. According to the CIA’s official statement, the 71 products represent more than 100 pages of analysis that are being made publicly available for the first time. The collection, the agency stated, “traces the story of CIA analysts’ evolving understanding of al-Qa’ida and efforts to highlight and warn of Usama Bin Ladin’s attack plotting despite sparse, vague, and imperfect information.”

Of the 71 briefing documents released, 47 contained a reference to Osama bin Laden in their headline alone — a figure noted by CBS News during its coverage of the release. The breadth and frequency of those references raises a question that analysts and historians have long grappled with: if the intelligence community was generating this volume of warning material, why did the attacks succeed?

A Timeline of Escalating Warnings

The documents, when read chronologically, present a portrait of analysts growing increasingly alarmed over a three-and-a-half-year period — and sharing those concerns at the highest levels of government.

1998: Early Signals and the WMD Question

The earliest document in the release dates to February 1998, prepared for then-President Bill Clinton, titled “Terrorists seeking WMD capability,” which mentioned Bin Laden alongside other Islamic extremists. By April of that year, a brief detailed the Taliban’s unwillingness to surrender Bin Laden, describing their “gratitude for his assistance during the Soviet occupation” as making them “reluctant to alienate him by monitoring or controlling his activities.”

By July 1998, briefers assessed it “plausible that Bin Ladin places a high priority on conducting attacks in the United States” and flagged his “interest in conducting attacks with chemical and biological agents.” Just two months later, in September 1998, analysts wrote that Bin Laden’s “preferred option is to strike the US on its own soil in Washington” and that al-Qaida “may fly an explosive-packed airplane into a US city.”

In December 1998, potential hijackings were explicitly raised. A briefer described how al-Qaida-linked conspirators “had evaded security checks during a recent trial run at an unidentified New York airport” and that “some members of the Bin Ladin network have received hijack training.” This assessment aligns with what the CIA’s Counterterrorist Center had separately reported to President Clinton that same month: that al-Qaeda was preparing for attacks in the United States that might include the hijacking of aircraft.

1999–2000: Dirty Bombs and Deception

By June 1999, intelligence officials had assessed that Bin Laden’s operatives had conducted experiments with explosives to “increase their energy output” as part of his pursuit of materials for so-called dirty bombs — conventional weapons laced with radioactive material. Around the same period, approximately two years before the attacks, intelligence officials became aware that Bin Laden appeared to be misleading the Taliban about his reluctance to launch an unprovoked attack on the United States.

Early 2001: Biological Agents and Operational Planning

Briefings prepared for President George W. Bush in early 2001 shifted focus in part to Bin Laden’s “experimentation by crude means to make and deploy biological agents.” Then, just one month before the September 11 attacks, a report noted Bin Laden’s commitment “to conduct terrorist attacks in the US,” observing that the 1998 al-Qaida bombings of US embassies in East Africa “demonstrate that he prepares operations years in advance and is not deterred by setbacks.”

A source cited in a document dated September 12, 2001 — the day after the attacks — indicated the strikes had been planned for two years and that the US Capitol had also been a target.

Intelligence Without Action: The Systemic Question

The release has reignited debate about the gap between intelligence collection and policymaker response. CBS News national security contributor and former Homeland Security Assistant Secretary for Counterterrorism Samantha Vinograd offered a pointed assessment: “Intelligence is only as good as policymakers make it. You could have a smoking gun in an intelligence assessment, even 47 of them, but unless a president or whoever is consuming that intelligence takes it and puts it into action in some way, that intelligence does not go much further than the Oval Office.”

Vinograd added that while the newly released documents confirm signs the attack was coming, “the intelligence was not digested in a way, coordinated in a way that led to actual action on the part of policymakers.”

This failure was not limited to the intelligence-to-policy pipeline. According to prior reporting and the Wikipedia documentation of pre-9/11 intelligence, information about the hijackers and attack preparations held by the NSA and CIA was not passed to the FBI until August 2001 — primarily due to communications lapses between agencies and the belief that attacks would occur overseas rather than on US soil.

External warnings also went unheeded. In April 2001, Ahmad Shah Massoud — leader of the anti-Taliban Northern Alliance — warned the European Parliament that his intelligence agents had gained knowledge of a large-scale terrorist attack on US soil being imminent. Massoud was assassinated by al-Qaeda on September 9, 2001, two days before the attacks. Russian President Vladimir Putin also called President Bush on that same day to express concern following Massoud’s assassination, warning that “something larger might be afoot.” British intelligence officials later acknowledged they had “prior intelligence that summer of Al-Qaeda planning a major attack.”

Context: The 9/11 Commission and Prior Declassifications

The CIA noted that this release represents the most thorough declassification effort since the 9/11 Commission’s work in 2004. The FBI’s investigation of the attacks — codenamed PENTTBOM, short for Pennsylvania, Pentagon, and Twin Towers Bombing — remained the largest case in the bureau’s history, with more than 4,000 special agents and 3,000 professional employees involved in the recovery and investigation. Agents followed more than half a million investigative leads and received several hundred thousand tips from the public.

The attacks killed 2,976 people and injured thousands more. Twenty-five years later, many first responders continue to face adverse health effects from working in toxic conditions at crash sites.

What the Documents Leave Open

While the CIA has framed the release as historic transparency, the documents themselves also illustrate the limits of what intelligence can accomplish when institutional barriers, inter-agency communication failures, and policy inaction intervene. The briefings show analysts doing their jobs — tracking, assessing, warning. What they cannot show is why those warnings did not translate into the preventive action that might have disrupted the plot.

The full archive of 71 declassified PDB products is publicly available through the CIA’s official website, offering researchers, historians, and citizens the opportunity to examine the documentary record for themselves.

This article draws on reporting from The Guardian, the CIA’s official press release, CBS News, Wikipedia’s documentation of pre-9/11 intelligence, and the FBI’s official account of the 9/11 investigation.

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