Decoding the CIA’s Declassified Pre-9/11 Intelligence Briefs

Twenty-five years after the September 11 attacks, the CIA released presidential briefing documents detailing what US leaders were told about Osama bin Laden and al-Qaeda prior to the hijackings that killed nearly 3,000 people.

CIA Director John Ratcliffe described the release as “an act of exceptional transparency.” This represents the agency’s largest-ever disclosure of presidential daily briefs—the classified intelligence summaries prepared for the president and senior officials.

What has the CIA just released?

The release includes 71 presidential daily briefs spanning February 1998 to September 2001. These highly classified summaries were prepared for the president and top government officials.

The documents total 101 pages. The earliest, titled “Terrorists seeking WMD capability,” is dated February 13, 1998. The latest, “Situation Report: Bin Laden’s Tracks,” is dated September 12, 2001, the day following the attacks.

In between, the briefs cover the Taliban’s refusal to surrender bin Laden, his pursuit of chemical, biological, and radiological weapons, his financing networks, and repeated warnings about his intent to strike within the US. Many pages are heavily redacted to protect intelligence sources.

What did US intelligence know about al-Qaeda before 9/11?

From early on, US intelligence possessed substantial knowledge about the terrorist group. The briefs show that analysts closely tracked bin Laden’s movements, his support systems, his network spanning the US and abroad, and how his operations were funded.

Some warnings were remarkably specific. In September 1998—three years before the attacks—a briefer noted that bin Laden’s “preferred option is to strike the US on its own soil in Washington.”

Analysts also monitored his interest in unconventional weapons, specifically chemical, biological, and radiological agents.

By June 1999, the briefs reported that bin Laden’s operatives had experimented with explosives to “increase their energy output,” as part of a broader pursuit of so-called “dirty bombs.”

The intelligence community also understood the obstacles they faced. An April 1998 brief found no evidence that the Taliban intended to hand bin Laden over, describing him as their “guest.” It noted that “gratitude for his assistance during the Soviet occupation” of Afghanistan between 1979 and 1989 left them “reluctant to alienate him by monitoring or controlling his activities.”

How many warnings of an attack was the president given?

The warnings were not occasional; they arrived consistently.

In 1998, 1999, and 2000, several reports were issued, including one titled “Terrorism: Bin Laden Extremists Planning Attacks.”

In 2001, when George W. Bush assumed office from Bill Clinton, the frequency of these warnings increased. By summer, the language grew increasingly alarming, culminating in a briefing simply titled: “Bin Laden Determined To Strike in US.”

Did officials know planes could be used in an attack?

Yes, as early as 1998.

A brief dated September 10 of that year, titled “Bin Ladin’s Location and Intentions,” recorded his stated preference for striking Washington. It then added that the group responsible for the summer’s East Africa US embassy bombings “may fly an explosive-packed airplane into a US city.” The Federal Bureau of Investigation (FBI) quickly determined that those attacks were carried out by al-Qaeda.

The same memo cautioned that intelligence provided “no conclusive information” regarding his intentions for future attacks.

That December, another brief described conspirators who “had evaded security checks during a recent trial run at an unidentified New York airport.” It also noted that “some members of the Bin Laden network have received hijack training.” Dated December 4, 1998, this brief was titled “Bin Laden Preparing To Hijack US Aircraft and Other Attacks.”

Does this prove the US government knew 9/11 was coming?

No. While it may raise serious questions about why the government did not appear more prepared, it shows no evidence of a lack of will to prevent an attack.

The newly released material reinforces the explanation that intelligence agencies possessed many pieces of the puzzle but failed to assemble them into a clear picture in time.

There is no evidence to support conspiracy theories about government involvement or prior knowledge of the attacks, which have grown in popularity in the US.

Are all of these documents new?

No, some briefs have been made public previously.

The two most well-known items were already available. The August 6, 2001 brief, “Bin Ladin Determined To Strike in US,” was declassified in 2004 at the 9/11 Commission’s request.

The broader findings are also established, including the fact that US intelligence tracked bin Laden’s intentions for years, that aircraft featured in the reporting, and that none of it identified the time, place, method, or targets of the eventual plot. The 9/11 Commission detailed all of this more than two decades ago.

This release adds the underlying documents in the briefers’ own words, rather than a commission summary.

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