Yea, you mean like the 9/11 Commission for one...
9/11 Panel Suspected Deception by Pentagon
August 2, 2006
Some staff members and commissioners of the Sept. 11 panel concluded that the Pentagon's initial story of how it reacted to the 2001 terrorist attacks may have been part of a deliberate effort to mislead the commission and the public rather than a reflection of the fog of events on that day, according to sources involved in the debate.
Suspicion of wrongdoing ran so deep that the 10-member commission, in a secret meeting at the end of its tenure in summer 2004, debated referring the matter to the Justice Department for criminal investigation, according to several commission sources. Staff members and some commissioners thought that e-mails and other evidence provided enough probable cause to believe that military and aviation officials violated the law by making false statements to Congress and to the commission, hoping to hide the bungled response to the hijackings, these sources said.
In the end, the panel agreed to a compromise, turning over the allegations to the inspectors general for the Defense and Transportation departments, who can make criminal referrals if they believe they are warranted, officials said.
"We to this day don't know why NORAD [the North American Aerospace Command] told us what they told us," said Thomas H. Kean, the former New Jersey Republican governor who led the commission. "It was just so far from the truth.... It's one of those loose ends that never got tied."
Although the commission's landmark report made it clear that the Defense Department's early versions of events on the day of the attacks were inaccurate, the revelation that it considered criminal referrals reveals how skeptically those reports were viewed by the panel and provides a glimpse of the tension between it and the Bush administration...
These and other discrepancies did not become clear until the commission, forced to use subpoenas, obtained audiotapes from the FAA and NORAD, officials said. The agencies' reluctance to release the tapes -- along with e-mails, erroneous public statements and other evidence -- led some of the panel's staff members and commissioners to believe that authorities sought to mislead the commission and the public about what happened on Sept. 11.
"I was shocked at how different the truth was from the way it was described," John Farmer, a former New Jersey attorney general who led the staff inquiry into events on Sept. 11, said in a recent interview. "The tapes told a radically different story from what had been told to us and the public for two years... This is not spin. This is not true."
Hmmm, between NORAD and the FAA, I wonder how many people got fired?
FAA Managers Destroyed 9/11 Tape
Recording Contained Accounts of Communications With Hijacked Planes
May 6, 2004
Six air traffic controllers provided accounts of their communications with hijacked planes on Sept. 11, 2001, on a tape recording that was later destroyed by Federal Aviation Administration managers, according to a government investigative report issued today.
It is unclear what information was on the tape because no one ever listened to, transcribed or duplicated it, the report by the Department of Transportation inspector general said...
The FAA said it was cooperating fully with the 9/11 panel. The agency said it took disciplinary action against the employee who destroyed the tape but declined to elaborate on what kind of action they took... :-o
the second manager said he destroyed the tape between December 2001 and January 2002 by crushing the tape with his hand, cutting it into small pieces and depositing the pieces into trash cans around the building, the report said.