everything or a majority of what hersh alleges. a tipster did walk up to the u.s. embassy in islamabad to tip off american officials about bin laden's whereabouts? >> well that's a very interesting report and i think we need to dig into it the deputy director of the cia has a new book out and he's going to be on cnn, he's the operational guy in charge of this operation. and i think it's a good opportunity to ask him about this. i mean the fact that there was a walk in -- the possibility, you know that's an interesting new dimension of the story, i think it needs to be dug into. who that walk in was, what he said how it fits into the larger picture, it's not clear yet. >> what hersh is also basing this article is that essentially the saudis were supporting bin laden for years while he was in hiding which i mean bin laden was a sworn enemy of the saudis. >> right, if there's one person