Credit Where Due
Thanks for the doing the right thing. Though it's mysterious why you and Dick would testify together, rather than individually like everyone else, what's most important is that the two of you will testify before all the commission members, and that Condoleeza Rice will testify publicly and under oath (this is the least she could do since essentially calling Richard Clarke a liar).
As a further thought, you may want to consider changing your relationship to the truth. How many people have resigned from your administration? How many have been stymied because of views that differed from your own?