chief weapons inspector richard butler serving as chief weapons inspector in iraq after the first gulf war, i asked him in he believed a deal could be done with iran. >> there's too much at stake to let it go. it's been going on for a long time. it's a serious issue. one can see that both sides want a solution to it. optimism is not something you have light leg in the field of arms control. my guess is they'll get there. >> the grand ayatollah khamenei said some military site inspectors was unsuccessful. you faced this sort of issue with iraq. in ayatollah khamenei insists on the point wouldn't it be a deal breaker. >> the chief negotiate your went to iran for talks and arrived back and said i have the authority to cut the deal. in other words providing the mask sides each side has. no one will sell it short. there are basic requirements provided they are met on both sides, the iranian chief negotiator has been given the authority by the leader to do the deal. now, when they take that home as there will will in congress there'll be political groups who will not like it. there, i like t

richard butler was the former ambassador and nuclear weapons inspector in iraq. the nonproliferation treaty were the only means for countries not obuild a bomb. listen. >> can anybody be prevented from acquiring them if they know how to build them? the answer is no. and that's a fact. can circumstances be established, agreement amongst nations that make it on balance far more sensible not to do this than to do it? the answer is yes. that's what we have in the nuclear nonproliferation treaty. that's why some 30 countries including my own australia who could readily make a nuclear explosive device don't do so. >> then there are the countries who have been trying. others said to be pursuing the bomb is libya and south africa during the apartheid years was said to be pursuing the bomb. are we talking about a selective treaty? >> this is true but really looking at the history of the treaty nearly 50 years when the treaty was brought open for signature there was an estimate that there would be many many many more nuclear weapons powers by this time so ultimately if you

richard butler was the former australian ambassador to the u.n. and chief weapons director in iraq. he said that agreements like nonproliferation treaty were the only way to stop countries that can build a bomb from doing so. take a listen. >> can anyone be presented from doing - from acquiring them if they know how to build them. the answer is no. and that's a fact. can circumstances be established, agreement amongst nation that make it on balance more sensible not to do this than to do it. the answer is yes. that's what we have in the nuclear nonproliferation treaty. that's why some 30 countries, including my own, australia who could make a nuclear explosive device don't do so. >> other countries have been trying, others pursuing the bomb is libya, iraq north korea, south africa during the apartheid years was said to have a bomb, and israel by some estimates has dozens if not more. are we talking about a selective treaty. >> this is true. looking at the issue of the treaty, when it was brought open for signature, there was an estimate that there would be many many many more nuclea