nobody had ever seen a pdb, a presidential daily briefing.hat's the holy of holies, protected by all presidents. they were generally concerned, they told us this a number of times, judge gonzalez, they were genuinely concerned that if we saw them having been created by congress, that congressional committees were going to come right behind us and say you've been protected in the courts, but now you've let it out, there's a precedent, we can see it. and we kept saying, the argument that's the title of the book. we kept saying this is 9/11, there's never been an event like it, what we are doing is without precedent, and anything we do is not going to set a precedent for anything that follows -- >> host: but, of course, they wouldn't, they couldn't know that for a fact. >> guest: no, they couldn't. so they were very concerned, and we understood that. >> host: sort of understandably in a way. >> guest: we just argued there was no way we could do our job without know what the president knew and when he knew it, and without that we couldn't have wr