I also believe 9-11 wouldn't have happened if Clinton had taken up the Usama offer. From a "live quote" by Clinton in response to his biggest regret: "That I didn't get Usama".
If you had seen his face, you would know that he also believes that 9-11 would not have happened.
If I remember correctly, the "two for one" of the Clinton presidency was notice that Bubba discussed "everything" with Hillary in making a decision. It was mentioned several times in variuos speeches. Watching him being taken down, "peg by peg" via Hitlery tells me that she MAY have been influential in letting Usama go.
I'm not sure if Hitlery addresses 9-11 in her book but I'd start reading between the lines.
Belief will never turn into facts.....