This is only the tip of the iceberg. From a NYT exclusive:
The direct warnings to Mr. Bush about the possibility of a Qaeda attack began in the spring of 2001. By May 1, the Central Intelligence Agency told the White House of a report that “a group presently in the United States” was planning a terrorist operation. Weeks later, on June 22, the daily brief reported that Qaeda strikes could be “imminent,” although intelligence suggested the time frame was flexible.
But some in the administration considered the warning to be just bluster. An intelligence official and a member of the Bush administration both told me in interviews that the neoconservative leaders who had recently assumed power at the Pentagon were warning the White House that the C.I.A. had been fooled; according to this theory, Bin Laden was merely pretending to be planning an attack to distract the administration from Saddam Hussein, whom the neoconservatives saw as a greater threat. Intelligence officials, these sources said, protested that the idea of Bin Laden, an Islamic fundamentalist, conspiring with Mr. Hussein, an Iraqi secularist, was ridiculous, but the neoconservatives’ suspicions were nevertheless carrying the day.
In response, the C.I.A. prepared an analysis that all but pleaded with the White House to accept that the danger from Bin Laden was real. [...]
And the C.I.A. repeated the warnings in the briefs that followed. Operatives connected to Bin Laden, one reported on June 29, expected the planned near-term attacks to have “dramatic consequences,” including major casualties. On July 1, the brief stated that the operation had been delayed, but “will occur soon.” Some of the briefs again reminded Mr. Bush that the attack timing was flexible, and that, despite any perceived delay, the planned assault was on track.
Yet, the White House failed to take significant action. Officials at the Counterterrorism Center of the C.I.A. grew apoplectic. On July 9, at a meeting of the counterterrorism group, one official suggested that the staff put in for a transfer so that somebody else would be responsible when the attack took place, two people who were there told me in interviews. The suggestion was batted down, they said, because there would be no time to train anyone else.
Suddenly the Richard Clarke, Michael Moore and Al Franken writings of that era don’t seem so far fetched, do they?