to disrail, derail pardon me this deal? >> i don't think so. first of all i think it's important to note that while benjamin netanyahu was repeatedly called iran an existential threat several officials in the israeli security establishment said in fact that's not true that while they see iran's nuclear -- potential nuclear weapon a threat they don't believe it is it's not a threat to israel's survival. israel is a country with a couple of hundred nuclear weapons. why are they there? but for deterrence to deter any country that could develop a nuclear weapon from using it. i think that's the perspective that many in the israeli security establishment see this through. >> final question was prime minister netanyahu of benefit to the americans in this negotiation? i know you paid close attention to what was going on in switzerland. was there a good cop, bad cop routine that secretary kerry was able to play out? >> it's a good question.