The purpose of the so-called 911 Commission appears to have been to deflect blame from the Clinton Administration for all of the mistakes made in dealing with terrorists, such as treating terrorists attacks as criminal matters rather than treating them properly as war. This article about Clinton's support of Al Queda during the 1990's, even though Al Queda, with support of Iraq, had conducted the first WTC attack in 1993.

http://strata-sphere.com/blog/

There has to be explanation for the bizarre behavior of Sandy Berger in stealing and destroying classified documents. I don't know if this is it, but it could be.