that Israel is responsible - not even John Pescatore who is the only one who even refers to Israel by mentioning Mossad. Unless the Guardian is prepared to name these experts and allow them to explain their conjecture, it would be much more reasonable for me to conject that this is the opinion of the Guardian and has no basis in fact. That said, I wouldn't be surprised if Israel was involved or any other country that is concerned about Iran (e.g. any of Iran's neighbours, the USA, France, Russia etc.). Also, the prevalence of the worm in Iran may be because it was actually written in Iran and escaped into local computer systems first. Just a thought or conjecture if you will... Another funny thing is that Microsoft EULAs state that their software is not to be used on life-critical systems. Could it be that the Iranian Government is using pirated copies of Windows as authentic copies cannot be sold in Iran? It interrupts the operation of the uranium enrichment equipment for one tenth of a second, which causes a complete failure in the process. This makes it impossible to enrich the uranium to a point where it can be used to fuel a nuclear power plant or to make a nuclear weapon with. No that cannot be right Nuclear Power is 100% reliable, it's so safe they can land aeroplanes on nuclear plants, so a little virus could not stop them working could it? That would mean you