Glenn Greenwald: 9/11 Commission: Our investigation was "obstructed"

The bi-partisan co-chairmen of the 9/11 Commission, Tom Kean and Lee Hamilton, jointly published an Op-Ed in today's New York Times which contains some extremely emphatic and serious accusations against the CIA and the White House. The essence:

[T]he recent revelations that the C.I.A. destroyed videotaped interrogations of Qaeda operatives leads us to conclude that the agency failed to respond to our lawful requests for information about the 9/11 plot. Those who knew about those videotapes -- and did not tell us about them -- obstructed our investigation.

More strikingly still, they explicitly include the White House at the top of their list of guilty parties