throughout negotiations with iran date can back to times when the e.u.-3 were negotiating to the president when the permanent members of security council were negotiating with the administration's consent on iran issues. i think it's an unfortunate concession, one that entirely implausible of using iran off the path for ultimate weapons capability. >> eric: it's their right to have nuclear energy, to have nuclear facilities for medical purposes. they would be saying 5% is just for that and not for a bomb? >> fair enough. but non-proliferation treaty says things along those lines but a point often overlooked in that those terms are be available for those that abide by the rules. one of the key tests had to dealing with violate there's gain the system deliberately to