Neil explains it all. Here's one paragraph, but you really have to read it all:

I have never thought that there was a "magic bullet" that would prevent the events of September 11th. But Kerrey and Roemer pointed out that the lack of a FBI intelligence system linked to the CIA would've easily helped gather info, and that the lack of the principals (or anyone) telling the FBI and their special agents to "look for sleeper cells" is doubly damning.

But what I really would like is someone, like Clarke, to simply say "Hey, we screwed up." The idea that is more principled to claim things couldn't have been prevented is wrong. After the Bay of Pigs incident, President Kennedy apologized for the failure. In this case, no high level advisor has ever publically said the same thing.

Even when the Republicans questioned Rice, she seemed idiotic. As one commissioner tossed out a series of softballs (the only questions Rice answered with short answers...the rest she filibustered on like a pro) she started to answer "no" to each one. Were you aware...? No. Were you aware...? No. Were you aware...? No. Isn't she the National Security Advisor? How come she's more out of the loop than Clarke was? If she didn't have any of this info, how could we expect the President to act on it? Perhaps Tenet should have been giving the PDB to Condi each morning, just to keep her notified. Maybe he did...and she just doesn't remember it. Perjury is a tricky thing, after all.