"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."
(Those who didn't know this haven't been paying attention, but this story contains the most comprehensive and damning evidence that the neo-cons in the Bush Administration ignored overwhelming evidence that terrorist attacks were coming and that they'd be big. Anything the Clinton Administration was involved in--and it was deeply involved in tracking and preventing terrorism--was discounted by these war mongering fools who wanted desperately to go to war with Iraq, which, of course, they did on the thinnest pretense.)