Iran is negotiating with the US and five other world powers to seal an agreement on the disputed nuclear program. All parties are working hard. The US is prepared to walk away if there isn’t a deal and there is absolute intransigence and unwillingness to move on the things that are important. P5+1 group – the US, UK, France, China and Russia plus Germany – wants Iran to scale back its sensitive nuclear activities to ensure that it cannot build a nuclear weapon. Meanwhile Iran insisted that its nuclear work is peaceful.