sharif said they are not prepared to give up their higher tech more ambitious centrifuge pure faatio purificaot at a point -- we'll let former sharif talk about and we'll discuss what we expect from him privately in the talks later this month. >> i guess what i would like to try to figure out then the american position that once a final deal is reached or in pursuit of a final deal, iran cannot have any centrifuge purification processes of its own. if it has nuclear fuel for civilian nuclear power production capability it must come from the outside. can it have nuclear power it produces its own. >> i'm not going to conduct a negotiate here on your set with you, major. here's what the president's position is. the key question is the president's committee to prevent iran from developing a nuclear weapon. that's what he made clear over the american people over the course of the last many years.wú nuclear weapons in the hands of the reernz would b iranians wou. it would set off a nuclear arms race which would be at nobody's. and that's why we're focus on precisely that. we'll press them on suppor