NYT reports that Stuxnet may have been a product of schemers in Israel and USA, an act of cyber warfare. The characteristics of the attack fits and it would make a good movie, but this if true would be an act of war. I doubt it makes the Iranians happy to negotiate anything with the West. More likely it would prompt Iran to develop independent technology.
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Part of the story is that the Israelis may use similar technology at Dimona, above.