clifford kupchan: absolutely. >> the ambassador was very concerned. clifford: the saudis have out tentacles as to what is a threat from iran. if the hot water goes off, the iranians did it. it is my view the saudis have their way with yemen. i don't think the iranians care very much. at least for now. their audience have a lot of time. more time than the saudis do. iran is not unstable. they will make it more stable after this deal. barbara slavin: no other experts? yeah, right there, great. >> one of the things about the agreement is that the double-digit timelines. that 10, 15, 20, 25 years. that raises the question, what will iran look like in 15 years? presumably khamenei will no longer be among us. at that point. and there will be a generation that is very plugged in. the cohort moving up. there will be a new successor generation, though one presumably no longer schooled in united states universities. so john, my question, can you define anything about assuming an agreement and a faithful and limitation of the agreement, what kind of iran will we