secretary of state john kerry face to face with his iranian counter part mohammad javad zarif. it was after this meeting it was announced mr zr would be return to -- mohammad javad zarif would return to tehran for consul sayings, experts are not sure if they've hit a problem. >> it could be there's a deal on the table that needs to be taken to tehran, because it goes beyond the mandate. >> the news that mohammad javad zarif was leaving came as others were arriving at the talks. german foreign minister frank wall streeter steinmeier, british foreign secretary phillip ham conned, and the e.u. chief fedor eka mogherini. >> i am sure if the will is there we'll get there. >> reporter: how tough are the days ahead going to be? >> it is going to be tough. it has always been tough, but not impossible. it's a matter of political will. >> reporter: all sides seem relaxed about an extension into the first few days of july. >>> gaps remain between all the sides in the negotiations between the u.n. permanent 5 and iran on the other. this talk of non-negotiatables and red lines, is it looking

because many of the foreign powers have left, mainly because the iranian foreign minister mohammad javad zarif is in tehran. there are not many meetings in some way, this could be the most important day, because he is speaking to the leadership in tehran including the supreme leader and the president. i asked an expert to covered the process, what he thinks is going on in tehran. >> an explanation is that the requirements of a deal acceptable for the p5+1 was pushing against the red lines of the supreme leader of iran and he had to go back for consultations to see if there was flexibility that iran could show. the second possibility was there was a proposal from the p5+1 that they didn't have instructions for and have to go back for consultation, and a third that is overlapping is the fact that both iranians might feel compelled to have close consultations with the leader so they alone don't accept accountability - failure or success. >> everyone agrees that the talks will go on past the deadline which was supposed to be on tuesday. tuesday will be an important day with the arrival of the russ

in addition as you know dr mohammad javad zarif's technical expert who heads the nuclear ex-parties team is not -- experts team is not able to follow him. there's further consultations, knowing they'll go past the deadline indicating that dr mohammad javad zarif needs further clarity on what he can do. >> what do you make. fact that mr mohammad javad zarif has left and is headed back to tehran? >> i think iran is in front of an important decision, some are technical, and some more policy or policy in nature. first of all, they have to great the final parameters of the enrichment programme. the people want to hear. it's one of concerns of the p5+1. and that is a policy decision. in the first case what are the right taken to the military side. they are all for the verification of the agreement, and making sure that iran complies with the undertakings and the compliance has an effect on the sanctions. how people are going to package it. and how it is based on the performance. these are performances. >> negotiations between the u.s. and tehran, and p5+1 is the u.s. paying too much too large

his counterpart, the foreign minister mohammad javad zarif flew back to tehran at one point to consult there. he's expected back at the negotiating table. the critics, meanwhile, pounced on the latest delay saying that president obama wants this too much he's willing to give up too much for the sake of a deal over iran for the sake of president obama's legacy. he went to every effort to take a tough line sayingee davis cupped trust rain and that this -- saying that he doesn't trust iran. let listen to what the president had to say. >> there's a lot of talk from the other side from iranian negotiators, about whether they can abide by some of the terms that came up in lausanne. if they cannot that's going to be a problem. because i said from the start, i will walk away from the negotiations if in fact it's a bad deal >>> and so ever since that deal was struck the interim deal in april, the iranians and the united states had two diamet likely opposed interpretationers of what was agreed to. iranians say no military facilities would be open to inspections, that's something the united state

. >> the counterpart mohammad javad zarif left vienna. u.s. officials say that's a good sign. he's expected back tuesday, after consultations in tehran. the obama administration concedes the talks are likely to miss the june 30th ds deadline. >> we are focused on getting the best agreement, the most comprehensive agreement, and if we have to work longer to do that, the team in vienna obviously. >> no one is talking about a long-term extension. >> the sticking points. how much access will nuclear inspectors have at facility y the u.s. and partners say there'll be total access. the iranians say no. the iranians insist that all sanctions be lifted on day one of a deal. the easing will be gradual. the u.s. thought there was agreement on both points. april. the two sides put out conflicting versions since an interim deal was made. since then iran's supreme leader ayatollah khamenei drew a hard line as skeptics in the u.s. called the talks a mistake. >> i fear we have point ourselves into a corn where we believe any deal is better than no deal. >> reporter: negotiators missed a marc

this as iranian foreign minister mohammad javad zarif heads back to iran to consult with officials there. james rosen is live in vienna and it's no surprise they didn't make the deadline. wasn't so much a hard deadline but the question is will they ever ever come to any kind of agreement? >> reporter: well julie, to be sure i didn't have a return flight booked for july 1st, and the negotiators in the iran nuclear talks weren't too terribly bothered by this looming june 30th deadline. became clear from two key developments today. first, as you just reported it was announced that iranian foreign minister javad zarif after what is likely to be a seven or eight hours of facetime with secretary of state john kerry over the course of this weekend is indeed leaving for a short trip back to tehran. u.s. officials said they were notified of that advance in expected ministers to come and go and secondly as you report u.s. officials basically gave up the depose and told reporters outright that the talks will likely extend beyond june 30th. secretary kerry also conferred with washington's p 5 plus 1