"Today, I will lay out the facts that caused those scientists and many other experts to reach the favorable conclusions that they have. I will show why the agreed plan will make the United States, Israel, the Gulf States, and the world safer. I will explain how it gives us the access that we need to ensure that Iran's nuclear program remains wholly peaceful, while preserving every option to respond if Iran fails to meet its commitments. I will make clear that the key elements of the agreement will last not for 10 or 15 years, as some are trying to assert, or for 20 or 25, but they will last for the lifetime of Iran's nuclear program. And I will dispel some of the false information that has been circulating about the proposal on which Congress is soon going to vote. Now, for this discussion, there is an inescapable starting point -- a place where every argument made against the agreement must confront a stark reality -- the reality of how advanced Iran's nuclear program had become and where it was headed when Presidents Obama and Rouhani launched the diplomatic process that concluded this past July. Two years ago, in September of 2013, we were facing an Iran that had already mastered the nuclear fuel cycle; already stockpiled enough enriched uranium that, if further enriched, could arm 10 to 12 bombs; an Iran that was already enriching uranium to the level of 20 percent, which is just below weapons-grade; an Iran that had already installed 10,000plus centrifuges; and an Iran that was moving rapidly to commission a heavy water reactor able to produce enough weapons-grade plutonium for an additional bomb or two a year. That, my friends, is where we already were when we began our negotiations."
US Department of State: http://www.state.gov/