I agree, that was one of his best lines. But I also think the hemming and hawing didn't come across well, before that. Say it at the outset, say it strong, say that "I was in office only 8 months before Sept 11 and did the best I could with the information available so I have nothing to apologize for!"
LQ
He could have said that and likely wanted to, but that would be participating in the blame game.
I do not know how he honestly could have answered the questions better. His answers were thoughtful. He is not on a campaign stump, nor did he want to do one liners ans appear insincere or pompous.
He was also speaking to Iraq and the Middle East.
A very difficult thing to do in a presser where no reporter is helping, but trying to dismember him in public.
His tone was informative. Kind of like how you would be responding to a question while sitting on your living room couch.
He was trying to honestly and truthfully answer these complicated questions in a way that everyone might understand, knowing that the mothers and fathers of sons and daughters that are in harms way were watching.
I think he got it across to them, and that is what is important to him.