Chilling Memo: Hijacks On The Radar

A newly declassified Central Intelligence Agency brief shows U.S. leaders were warned in 1998 that Osama bin Laden was preparing to hijack American planes.

Story Highlights

A December 4, 1998 presidential brief warned of bin Laden hijacking plans.
The 9/11 Commission confirmed that warning and later declassified it.
Federal leaders received repeated alerts before 9/11 but lacked exact timing and method.
Officials acknowledged they never penetrated the 9/11 plot overseas.

Declassified Warning Spelled Out Hijack Threat in 1998

On December 4, 1998, a President’s Daily Brief prepared by the Central Intelligence Agency warned that bin Laden was preparing to hijack United States aircraft. The brief said some of his network had hijack training. The one-page item was later declassified for investigators. It is not a rumor or a leak. It is the government’s own record. The 9/11 Commission cited the brief’s existence and content during its review, confirming that top leaders were told years before the attacks.

The official 9/11 Commission Report states that the December 1998 article described a threatened hijacking in the United States and that it was declassified at the Commission’s request. That confirmation matters. It removes guesswork and politics from the core fact: a hijack threat was flagged to the President. This is part of a larger pattern of warnings that pointed to danger but did not deliver a specific flight number, date, or target city before September 11.

Leaders Heard Many Al-Qaeda Warnings, But Not a Precise Blueprint

The record shows a drumbeat of alerts in the years and months before the attacks. The Commission wrote that agencies received a stream of warnings that al-Qaeda planned something “very, very, very big,” yet these did not reveal exact time, place, or method. Analysts flagged hijacking risks, but they lacked operational details needed to take narrow, immediate steps. This gap between strategic warning and tactical certainty is central to the historical finding.

George Tenet, then Director of Central Intelligence, told the Commission that the agency never penetrated the 9/11 plot overseas. He also said his officers could not corroborate some of the most sensational reports, including bin Laden’s intention to hijack United States aircraft. His testimony helps explain why agencies did not lock onto a single plot line, even as warnings mounted. It also shows why reforms later focused on sharing, analysis, and speed.

What This Means for Accountability and Today’s Security Posture

The government’s own investigators concluded that the measures adopted from 1998 to 2001 did not disturb or delay the al-Qaeda plot. The report described resourceful plotters, but also real gaps in how agencies prepared for a hijacked plane used as a weapon. For readers who value strong defense and limited but effective government, this is the core lesson: when warnings exist, leaders must turn them into action fast, without waiting for perfect detail.

Today, under President Trump, the charge is clear: keep air travel secure, crush foreign terror threats early, and demand clarity from intelligence agencies. That means tight watchlists, firm border controls, better red-teaming of worst-case scenarios, and accountability when agencies miss the mark. The 1998 brief shows what happens when clear warnings stall in the system. The country needs a security culture that treats these alerts as triggers for action, not files to revisit after a tragedy.