I will bet that George Tenet told the 9/11 committee that he had been warning the Clinton Administration about these things, obviously the 9/11 Commission didn't get this info from any place else but the CIA, and if Clinton felt it was important enough to send his National Security Advisor to the National Archives and steal classified documents in order to cover up his administrations inactions about the gathering danger presented by Al-Qaeda.
Don't forget, we are now just hearing about Iran's connection to Al-Qaeda, I wonder if the Bush Administration was never briefed about this Intel on Al-Qaead upon his arrival because the Bush Administration would immediately ask why nothing was done about it. In other words Clinton didn't want to brief President Bush on something he swept under the rug.