Are we ever going to know what REALLY happened before and on 9/11?

[Lauren2882]

I've been following the coverage of the 9-11 Commission fairly closely, and am now reading at the website http://www.cooperativeresearch.org/ the Commission's report contains some errors, mostly by ignoring the facts contained in Richard Clarke's book.
Then there's the debate here about the level of complicitness or involvement of the Bush administration. I guess I have 2 questions:
1) Does anyone besides me find all of this information so confusing to sort through that you can't even figure out what YOU think? and
2) Do you think we'll ever KNOW what happened, or will this remain one of the great mysteries of history?