One document, dated September 10, 1998, warned President Clinton that a group linked to bin Laden could potentially use an aircraft carrying explosives and crash it into a U.S. city. Three years later, terrorists hijacked four commercial aircraft and used them in attacks targeting the World Trade Center, the Pentagon and other locations.
The newly released documents show that, in the years leading up to 9/11, the CIA repeatedly warned that bin Laden could launch attacks against the United States or American interests abroad.
Some intelligence reports indicated that al-Qaeda could target areas in Washington, seek materials for developing nuclear weapons, use chemical weapons or attempt to kidnap American citizens.
A CIA report dated August 6, 2001, stated that al-Qaeda operatives had been living in or traveling to the United States for years. The FBI had also identified suspicious activities that could have been connected to preparations for aircraft hijackings. At the time, U.S. authorities were investigating activities linked to bin Laden.
However, a 2004 investigation concluded that although intelligence agencies had issued several warnings, they had failed to fully recognize the scale and urgency of the threat.
The investigation also found that inadequate coordination and information-sharing between government agencies prevented available intelligence from being effectively connected and acted upon in time.
The documents provide further insight into the warnings received by U.S. authorities before the 9/11 attacks and the challenges intelligence agencies faced in assessing and responding to the threat posed by al-Qaeda.
