How US Spies Secured the Hiroshima Uranium

At the outset of World War II, when the U.S. launched the extraordinarily secret Manhattan Project, uranium from North America and most of the rest of the world was less than one percent enriched and considered inadequate to build the first atom bombs. But there was one mine in the world where, through a freak of nature, the ore contained up to an unheard of 75 percent enriched uranium: Shinkolobwe mine in the present-day Democratic Republic of Congo.

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