The Gadget. First nuclear device exploded at the Trinity site. 1945From Secrecy News:
A book published this year in Brazil on “The Physics of Nuclear Explosives” prompted concerns at the International Atomic Energy Agency (IAEA) that it revealed classified nuclear weapons design information and that it might signify a renewed interest by Brazil in developing such weapons. The U.S. Government also requested further details on the matter, the Brazilian press reported.
According to the Jornal do Brasil, which first disclosed the controversy on September 6, the IAEA “wanted the book to be recalled” and demanded more information on the author’s work. The government of Brazil refused to censor the book and rejected what it described as IAEA interference.
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Update: A dangerously explosive book? -- Short Sharp Science/New Scientist
My Comment: Books do not kill people. People do.