The secrecy rules used when evaluating the contents of the Smyth Report — only things already known, or easy to know.pic.twitter.com/LV0XemlI81
@wellerstein These rules were, as an aside, the very first attempt at declassification criteria applied to nuclear weapons.
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@wellerstein The irony of course was that the Soviets found out more secrets by knowing what Groves decided to omit from the second edition.Thanks. Twitter will use this to make your timeline better. UndoUndo
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