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How to build a bomb

How close is Iran to building a nuclear weapon? And what can the US do to stop it?

Other articles in the Prospect online symposium on the Iranian nuclear crisis:

Philip Gordon explains why the US is unlikely to bomb Iran Michael Rubin argues that diplomacy is not enough Alastair Crooke says that the west are trampling over Iran’s rights Nazenin Ansari suggests that the Iranian state may be susceptible to sanctions Esther Herman on her encounters with everyday Iranians

Anyone seeking to build a nuclear weapon needs two things: 1) enough fissile material for a critical mass (either 20-25kg of highly enriched uranium, the material used in the Hiroshima A-bomb, or 6-8kg of plutonium, as used…

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