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