the northeast to say we're going to strike an accord to allow you to continue your uranium enrichment and it encourages other countries to say we've abided by this and if you allow iran to do this, why can't we do this? >> we didn't stop pakistan. we didn't stop north korea. the idea that iran can be stopped if they want to make a nuclear weapon seems to not have a great historic precedent. >> they have the know-how. they're always going to have the know-how. what would it take if they make the decision that they're going to pursue the bomb? it would take a sustained military campaign. not just a bombing campaign because a bombing campaign would set them back for a period of time, but if they were determined, it would have to be repeated bombing campaign and it may involve boots on the ground. because that is often an awful prospect, we need to try everything, in my view, to see if that he is a peaceful way to put an end to this program. that's why i think the interim deal makes sense. i share the skepticism that we