As far as I can tell, the New Yorker hasn’t posted Steve Coll’s piece on the Khan network yet, but they have a Q&A transcript on their website that’s worth checking out.
This excerpt about the time frame for an Iranian nuclear weapon is interesting:
Q: The question of how fast can’t be answered definitively, but could you give us a sense of the estimates and how reliable you think they are?
A: John Negroponte, the director of National Intelligence, has said, in his most recent public assessment, that the American intelligence community believes that Iran may acquire a nuclear capacity some time in the next decade, meaning from 2010 or 2011 onward. From my reporting, I gather that in private briefings the Bush Administration’s intelligence analysts focus on a five-to-seven-year window, although they emphasize that there’s a fair amount of uncertainty about this estimate. I think the one assertion that the intelligence community seems comfortable with is that it’s not this year or next year and probably not the year after that. However, the more that is discovered about Iran’s research, the more some analysts wonder whether Iran might be able to move faster than the official forecast indicates.