RON K WAS PRETTY DAMNED PRESCIENT, as this post from Slate's "The Fray" from September 17 illustrates:
Retrospective analysis will disclose a great number of warnings, alerts, leads and tips ... some of them remarkably specific. Big deal.
The real trick, as always, is to distinguish genuine foresight versus the ordinary daily stream of "alerts".
That's why I don't think that the government necessarily could have prevented the attacks. I just think it's ridiculous of them to claim they couldn't have imagined them. Note: Patrick Ruffini has some good thoughts. And Martin Devon raises the real questions. Someone should ask them to George Tenet.
UPDATE: RonK has his own, up-to-date list of questions that should be asked.