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Digital Archive International History Declassified

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  • May 03, 1954

    Memorandum of Conversation between Deputy Foreign Minister Zhang Hanfu and Indian Ambassador to China Raghavan Concerning Premier Nehru’s Statement on the Hydrogen Bomb

    Zhang Hanfu and Raghavan discuss the hydrogen bomb and the Colombo Conference.

  • August 24, 1955

    Report by N.M Emanuel, 'Regarding the Nature of the Fallout Path of the Hydrogen Bomb Detonated on 1 March 1954 at Bikini [Atoll]'

    Report by N.M. Emanuel on the U.S. Castle Bravo test in the Marshall Islands. The report surmises from fallout data that the bomb used a fission-fusion-fission design, and that the bomb contained a larger than normal amount of fissile material which induced a thermonuclear reaction.

  • March 28, 1958

    Conversation of Mao Zedong with Soviet Ambassador Pavel Yudin (Excerpt)

    In a conversation with Soviet ambassador Yudin, Mao sees a prohibition of the use of hydrogen weapons as very likely, as the capitalist countries "[fear] fighting this kind of war." Further, he notes that the socialist countries have an advantage over Western ones in terms of conventional army size.