correspondents said there is - significant public expectation in iran that those sanctions will be lift eded so it s a good tactic to put leverage on the country across the table and i think secretary kerry hopefully is able to do that. let s talk about those negotiations. as we ve seen as we ve heard, iran seems defiant on the outside, but what about at the actual negotiating table. how do you hammer out an agreement with a team of negotiators that you ve been so alienated from? well this is the really unique feature of this negotiation. we have not had a substantive sustained conversation, the united states and iran, in 35 years until secretary kerry and the iranian foreign minister javad zareef began to meet a year and a half ago. that s a value to the united states. it makes us smarter about iran better to negotiate a good deal having that type of contact. but it does mean there s a huge chasm of trust between these two