Let's go to skype now to see how this is playing inside iran. Thomas, in tehran what is the mood this morning. Well, you know, what was interesting, as I came back from the press conference with the... See More
Let's go to skype now to see how this is playing inside iran. Thomas, in tehran what is the mood this morning. Well, you know, what was interesting, as I came back from the press conference with the president rouhani, I was almost embraced by my neighbors who, for years have been asking me, thomas, what will happen with the nuclear program? Today, for the first time in a long time, they were all smiling. Before that, I was invited to a selected press conference at president rouhani's office, he said that the regime of sanctions against iran has now been broken. It's interesting to seeing the iranian journalists, first journalists and secondly iranians themselves. How happy they are and how upbeat they are. They're saying they are experiencing one of happiness and hope. I called the man who normally exchanges the dollar for me, and he told me that the iranian national currency, which has lost over 100% over the last years because of sanctions to the dollar, had actually gained some strength this morning, business people feel that this agreement is one that will bring iran forward in the coming months. Thanks for that, thomas. Now, here to analyze and debate the deal, christiane amanpour and martha raddatz, richard haass and bill kristol. Thanks to all of you. Christiane, let me begin with you, we just heard that report from tehran, there's no question that leading up to this agreement that the pressure was really starting to build inside iran because of the sanctions and president rouhani elected in part to get that relief. That's absolutely right. Anecdotely, when the foreign minister came into the press conference in geneva to announce the deal, there was a huge cheer for the iranian reporters showing you how much they wanted this to happen. This has hurt the iranian people very, very much, not so much the regime. I think what you just heard from senator chambliss and others and secretary kerry, here's the deal about sanctions, and I think we should be very clear about this, this is what the facts have shown. They have hurt iran and the economy and the people and were a long way to why rouhani got elected. But sanctions have not stopped iran from continuing its nuclear program. You heard what secretary kerry said, 160 centrifuges before the sanctions ten years ago, 19,000 now, so if the deal is to try to get iran to contipulate and surrender their nuclear program, that hasn't worked. So, intelligence people here, britain and others, who are very aware oft's going on, this interim deal is a good deal, it's significant freezes and suspension by iran for very modest, temporary reversible sanction relief. By the united states. And christiane, we saw that reaction from prime minister netanyahu in israel. What about the rest of the region? Well, the rest of the region, it depends on which part of the region. Yes, israel, aud saudi arabia, are freaked out. They don't want to see any lessening of pressure on iran. Israel is very concerned. The saudis are in a proxy war for influence in that part of the world. They don't want to see any letup on iran. Other parts of that region want to see, you know, less tension, so they want to see -- the deal is six months, we're not going to know what's going to happen in a comprehensive deal. It's going to require a lot more from iran and the united states. A lot of harsh negotiating. Martha, we're also learning this morning, fascinating to learn that not only these high-level negotiations going on in geneva, secret talks between the united states and iran. I loved this part of the story, george, imagine u.S. Officials going over to oman and in geneva on a military airplane into oman, this is the deputy secretary of state william burns, and jake burns, they went over there, met with senior iranian officials, and nobody really knew about this, including some of our closest allies, including israel. And they basically set the stage. They had about five secret meetings. At the same time, we're seeing debate about what this does to the iran program. Secretary kerry said it expand the period for them to get a nuclear weapon. Senator chambliss disagrees. What is the united states' estimate how much time this is buying us? They believe it doubles the time to breakout. When the iranians could push for a nuclear weapon, the worst case was one to two months, israelis believed it could happen in one month. They believe this would double the time because it eliminates the production of 20% highly enriched uranium. You're calling it, bill kristol, a pause for the iranians. Yeah, taking breakout time from one to two months to three to four months. Of course the iranian regime is very happy with this deal and our allies are very unhappy with it. And our allies are right to be unhappy. And the iranian regime, president rouhani is goating and he has every right to gloat. Which one is more reversible? We're not going to find out until we get to a final deal or this unravels. Each side is selling it that they're basically getting more than they're giving up. At the end of the day, this is a limited deal that does limited things for a limited duration. The real focus is not where we go over the next six months, it's one year, if you read the text, the goal is that, within one year to complete the negotiation and begin the implementation of the so-called comprehensive follow-up deal, which, by the way, is of unknown duration. You have been inside the state department, what will happen over the next several months? In the short run, it's going to be defending this in congress. But then, it's going to be spell out all of the details. How many centrifuges will iran ultimately be allowed? How much enriched uranium will iran be allowed to keep? What will be the detailed nature of the inspections? How often? At what sites? There's so much that remains to be negotiated here. Bill, what do you think -- how much time do youu think prime minister netanyahu is willing to give the united ates? At least six months. I'm not so showure about that. It's a question of whether iran can break out nuclear weapons. Whether they can deceive within the six months. From his point of view, the gamble over the last years, have paid off for them. They're getting sanctions relief. Dismantling nothing. And getting sanctions relief. 6 billion. Secretary kerry said, every day -- apparently, they did not get the standard monitoring of the iaea wanted. To answer your question, I don't think the prime minister will think he's constrained by the united states to having a six-month deal. If they're going to break out, they're going to break out. Christiane, how much time do you believe that president rouhani and his team have to continue the negotiations? They're under pressure as well. They are. Here's the difference, under the completely contemptible time of ahmadinejad, there was no way that this was going to happen. And it was static for a long time. Now rouhani has done what many people think is the impossible. He has the harmony behind him. For the moment. By the way, this isn't historic. In 2003, et cetera, it was frozen for two years and suspended the entire program. So, I think, in terms of time, where the israelis are really concerned it's the about the iraq heavy water reactor. This deal apparently says that they can't proceed without iraq. Israelis have told me, if they need to, they might go off to iraq if the u.S. Didn't at all. The iraq thing is very, very important. What I'm being told in the future, iraq cannot be a heavy water reactor, it cannot be a plutonium producer. It must be converted to a light-water reactor. We'll see. Finally, richard haass, what is the odd that this leads iran from having a nuclear program? Preventing? It won't do that much. The negotiations like this, george, don't solve problems. They manage them. Think of this as a condition to be managed. How much is iran going to be allowed? How much time will we have? If iran decides to cheat or break out, how much warning will we get? The real question is, how much warning and how much confidence do we have in that morning and that introduces a degree of stability or instablgt?
This transcript has been automatically generated and may not be 100% accurate.