fabius' increasing rule -- increasing role. on several occasions, that iran has to do more than they were offering on the nuclear deal. people had to remind -- people have been bringing them back. stuart: thank you so much. arthur mcmillan speaking live from tehran. the leader of turkey's pro-kurdish operation has called for immediate hold tossed a lit is on both sides after turkish airstrikes. saying hostilities should immediately come to a halt and all parties should act with common sense. it comes after the turkish president has said that his country cannot continue a peace process with the kurdish pkk. we go to jasper mortimer joining us on the turkish-syrian mortar -- the turkish-syrian border. last night a legend positions in turkey and syria were attacked. what does that say about the current conflict? jasper: it shows how much the conflict has escalated. since monday morning guerillas allegedly blew up a gas pipeline in eastern turkey, blew up a road bridge in southeastern turkey, and they have been killing or kidnappin

mr. fabius: we are a few meters away from the finishing line. but we know the last meters are the hardest. there's a lot at stake, the fight against nuclear proliferation and the renovation of iran into the international community. catherine: john kerry took a break from the long and intense negotiations. he's extended his stay, as has his german counterpart. the iranian foreign minister urged negotiators to show flexibility. mr. zarif: i hope our colleagues will recognize the fact that this is a unique opportunity and they need to take advantage of it. catherine: discussions over three demands, first, the timescale. the international community want a 10 year deal, iran wants a shorter framework. western powers want to gradually lift sanctions, iran demands an immediate lifting as soon as an agreement is reached. the third sticking point is whether tehran should be allowed to continue research on modernizing centrifuges. the u.s. warrants s a consensus is not reached, the international community would take stronger action. mr. ernest: even tough