Remember the Rats wanted to politicize the intell to take down Bush. Many classified pieces of info were leaking to the public. I theorize that Berger was told to get in there to remove anything that could ultimately come back to bite Bubba in that scenario. Then, the 9/11 Commission was seated and more speicific *notes* and docs had to be removed to cover a whole bunch of booty.
The high profile testimony didn't happen until last spring, but they were an entity at that point.
National Commission on Terrorist Attacks Upon the United States (also known as the 9-11 Commission)
excerpt:
created by congressional legislation and the signature of President George W. Bush in late 2002
And to go back to my previous point, that August 2001 PDB was leaked and the "Bush Knew" headline appeared in May 2002. Around the time the idea of this commission was starting to be bandied about and the dems were crying "cover-up" because the Bush administration didn't sign onto the idea immediately.