source of his concerns. i think he has two kinds of concerns. one, he fears psychology are going to fray sanctions and reduce leverage. i think here you can address concerns by saying to him we re going to be vigilant on this and continue to work with you. from the beginning of the administration worked closely with israelis to identify sanctions that matter and ensure others wntd invading them and iranians weren t allowed to get around them. i would say lets maintain that close cooperation. we will work with you on a day-to-day basis to ensure sanctions don t fray. number two, i would try to address the concern he has about what s the end game. the big concern he and others might have, you produced a first step agreement, how do you know it s not the last step. if it s the last step freeze them at 20,000 centrifuges which means they will have a breakout capability. the way to address that make it