Yes, Bush ignored the warnings of an attack, took the longest vacation in history and then went to Florida to read "My Pet Goat".
This has been argued ad nauseun multiple times, but here goes - there was no actionable intelligence - nothing specific enough to act on. The political climate at the time in the Congress and the public would not have supported any kind of pre-emptive actions based on such vague warnings. Look at all the crap that flew over Somalia and Bosnia. No one believed America would ever be attacked in that fashion. Add to that - 9/11 was in the planning for years - it didn't come into being spontaneously so if you have to blame Bush, well - blame Clinton too - it would be just as inaccurate. And, frankly - I think one of Bush's finest hours was in his handling of 9/11 and the aftermath. To bad he screwed it up by invading Iraq.