As the United States marked the 25th anniversary of the September 11 attacks on September 11, 2026, the CIA released one of its largest public sets of declassified presidential briefing materials tied to al-Qaeda and Osama bin Laden. At the center of that disclosure is a September 1998 warning delivered during the Clinton administration stating that a group linked to bin Laden might use an explosive-packed airplane against a U.S. city. The newly public records expand on intelligence concerns that were documented before 9/11 but were not fully available in original briefing form until now.
CIA release puts a September 1998 warning into the public record
The CIA declassified 71 presidential daily brief-related products on September 11, 2026, calling the release its largest public disclosure of 9/11-related CIA PDB material, according to the agency. Reporting by the Associated Press and CBS News said one September 10, 1998, memo warned that a group tied to Osama bin Laden “may fly an explosive-packed airplane into a U.S. city,” while also noting that the intelligence did not provide conclusive information on future attack plans. The newly released material places that warning directly in the documentary record reviewed by the public.
The scale of the release matters because earlier public accounts often described the existence of such intelligence in summary form rather than through the underlying briefing documents themselves. The 9/11 Commission Report and the 2002 Joint Inquiry both said intelligence reporting in 1998 included concern that bin Laden’s next operation might involve an explosives-laden aircraft aimed at a U.S. target, including an airport or city. What is new is the CIA’s publication of the briefing-era documents themselves on a date chosen to coincide with the 25th anniversary of the attacks.
The release also included other pre-9/11 warnings showing how often bin Laden and al-Qaeda appeared in top-level intelligence products. According to the Associated Press, the declassified set ranges from early 1998 items mentioning terrorists seeking unconventional weapons capability to post-attack reporting dated September 12, 2001. That wider record does not establish that officials knew the precise 9/11 plot in advance, but it does confirm that aircraft-related threats were on the radar years before the attacks.
The September 1998 language referred to a possible strike on “a U.S. city,” which made the threat national in scope rather than tied to one state or one local jurisdiction, according to the declassified reporting described by AP, CBS News and other outlets. The records now public do not identify a specific city in that warning. They also do not provide a publicly confirmed target list attached to that September 10, 1998 brief.
That lack of geographic precision is significant for readers trying to understand whether federal officials had advance notice about New York, Washington or another location. Separate historical reporting cited by the 9/11 Commission and the Joint Inquiry referenced other intelligence about possible attacks on the World Trade Center, Washington landmarks and U.S. airports, but those were distinct reports gathered at different times. The newly highlighted September 1998 warning stands out because it explicitly raised the possibility of an explosive-packed airplane entering a U.S. city.
For residents, the practical impact of this release is informational rather than operational. The documents do not announce a new threat, a reopened public alert system or a newly identified local risk. Instead, they add detail to the historical record around how intelligence was collected, summarized and presented to senior policymakers before September 11, 2001, when nearly 3,000 people were killed in the hijackings and subsequent crashes, according to longstanding federal and news accounts.
The reason this document is drawing attention now is not that the warning itself is new in substance, but that the source material has been declassified in fuller form. The CIA said the September 11, 2026 release was intended as a transparency measure tied to the 25th anniversary of the attacks. News coverage from AP, CBS News and The New York Times said the files revive longstanding debate over whether repeated warnings about bin Laden and aviation threats received enough urgency inside government before 9/11.
Historical investigations have already shown that U.S. intelligence held fragmented but serious reporting about al-Qaeda’s intent to strike inside the country. The 9/11 Commission said intelligence agencies saw recurring indications of hijacking and aircraft-related plots, but did not connect the available reporting into a warning that disrupted the specific September 11 operation. The Joint Inquiry similarly documented multiple pre-attack threat streams involving landmarks, airports and explosive-laden aircraft.
What the newly public 1998 brief means for readers is that the historical picture has become more concrete. The warning now can be read as part of a documented sequence of presidential-level intelligence reporting rather than only as a later summary in congressional and commission findings. With the CIA’s release now public, the discussion is likely to remain focused on the gap between broad strategic warning and the government’s inability to stop the attack that occurred on September 11, 2001.