I would like to ask for scientific clarification on a less commented part of Iran's nuclear technology preparations. It is fine for us to do the politics here as well, but that is also discussed in lots of places. This site is particularly suitable for scientific/technological background you don't get elsewhere. I remember being shocked reading how President Truman asked for the arguments about the use first ever use of nuclear weapons on one page, I think one side, of paper. But faced with all there has been on Iran and nuclear technology here, which I have far from all read, I do see advantages in having it all on one page! About Uranium enrichment I have more or less formed some picture. As fuzzy on the state of things as anyone's but a picture of the issues, to judge new announcements as they come along. To judge where people are coming from when they say the things they do. Less talked about than Uranium enrichment was something I think about heavy water which has to do I think with Plutonium. A particular plant was mentioned at least in the news. I have forgotten more than I remember e.g. I went through all the UNSC Resolutions. For the specific technologies you had to wade through annexes or documents cited by the Resolutions. But it was said in the newspapers that one or more plants had no convincing non-military rationale. Specific technologies or materials were I remember mentioned in the Resolutions. This is an invitation to explain (on less than a page) the nitty gritty about these things. What they mean, what is known, the rationale of the sanctions. Not the politics, not the Ahmadejin is a much misunderstood and mistranslated guy, not the Israel has one too, not the human rights and elections in Iran. We can get onto subjects arising later or elsewhere.