u.p. u.n. security council plus germany. the key five plus one it's called. iran's top negotiator said that he presented his framework in geneva this week and that the security council accepted it. so, gone for now the tension that colored nuclear talks under iran's previous administration. want to go to jim shut tote here. i've covered these talks before under president bush. they have failed repeatedly. but you describe this as more serious, more technical in this round of negotiation. tell us what that means and why it's a good thing. >> well, first of all, clearly this is the first sthaep we've seen after the iranian president has taken this new approach towards the west. what we saw in new york during the u.n. general assembly, the phone call between president obama, president rouhani, this kind of thing. now we're moving to the substance of that, what is behind this and will it be followed by real action. what you've got in these talks was a more detailed proposal than the americans or the