[jackbill]

This needs further investigation; given the documents he destroyed were copies,

Three of the documents are forever gone. There are no copies.

It is said that the documents were evolving drafts of the same document, and there are perhaps copies of them around. However, the documents that Berger destroyed contained "margin notes" made by people who had read the drafts and there are no copies left that have those "margin notes". They're gone.

It was purely and simply a cover-up. Berger planned to lie to the 9/11 Commission and he destroyed documents/margin notes that he knew would expose his lies.

[MamaLucci]

It was purely and simply a cover-up.

So was Watergate......