Presidents Bill Clinton and George W. Bush received multiple warnings prior to the September 11, 2001, terrorist attacks that al Qaeda leader Osama bin Laden was planning to use hijacked passenger planes to strike targets within the United States, according to government documents released on Friday. The previously classified files, made public by the Trump administration, reinforce long-standing critiques that U.S. intelligence agencies failed to act decisively despite repeated alerts.

The dossier includes a December 4, 1998, intelligence briefing prepared for President Clinton, which explicitly noted that members of bin Laden’s network had undergone hijack training and suggested the possibility of attacks on U.S. aircraft. A related September 10, 1998, document warned Clinton that bin Laden favored striking the U.S. on its own soil, potentially with an explosive-laden airplane targeting a major city. The documents also indicate that al Qaeda operatives carried out what was described as a “trial run” at a New York airport nearly three years before the 2001 attacks.

Further intelligence from February 2000 revealed that authorities had seized a manifesto listing cultural landmarks, including the Statue of Liberty in New York Harbor and the Eiffel Tower in Paris, as possible targets. Other materials detail the group’s continued preparations, including a July 25, 2001, memo addressed to President Bush titled “Bin Laden Determined to Strike in US.” The memo stated that al Qaeda included individuals who were U.S. citizens and maintained a support network within the country that could facilitate attacks.

By August 2001, intelligence briefings informed the Bush administration about an expanding FBI investigation related to bin Laden, with approximately 70 active field inquiries across the United States. Despite these warnings, the attacks on September 11 resulted in the deaths of nearly 3,000 people and marked a profound failure of U.S. preventive efforts against terrorism.

These disclosures highlight the depth of intelligence available before 9/11 and have fueled ongoing discussions on missed opportunities and the adequacy of counterterrorism measures in the years leading up to the attacks. While officials at the time faced challenges in fully grasping and acting on the threat posed by al Qaeda, the documents provide a clearer timeline of warnings that were in the hands of senior U.S. policymakers prior to the tragedy.