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Digital Archive International History Declassified

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  • April 21, 1954

    Letter from Roger Makins to Lewis L. Strauss

    Roger Makins of the British Foreign Office writes to Lewis Strauss of the American Atomic Energy Commission regarding a change in policy to allow Britain to share nuclear information with members of the British Commonwealth.

  • 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.

  • May 13, 1954

    Rajya Sabha Q&A on India's Participation in Nuclear Energy Talks in Ann Arbor, Michigan

    Transcript of questions and answers between members of Rajya Sabha and the Minister of Natural Resources and Scientific Research, Maulana Abul Kalam Azad, on whether or not India plans to attend a nuclear energy commission in Ann Arbor, Michigan.

  • September 22, 1954

    Rajya Sabha Q&A on the Disarmament of Conventional or Atomic Weapons

    Transcript of questions and answers between members of the Rajya Sabha and the Deputy Minister for External Affairs, Shri ANil K. Chanda, on whether or not India will present before the United Nations Disarmament Commission.

  • January 31, 1955

    Address by Zhou Enlai at the Plenary Session of the Fourth Meeting of the State Council (Excerpt)

    Zhou Enlai addresses the State Council citing a need for China to "master atomic energy." The Chinese program is far behind in this area, but plans to catch up with the help of Soviet technical assistance.

  • February 01, 1955

    French Foreign Ministry, Note on Indian Foreign Policy and Franco-Indian Relations

    Note prepared by the French Foreign Ministry prior to Prime Minister Nehru’s visit to Paris in February 1955. It observed that France could find in India a cooperative partner in Asia despite their outstanding disagreements.

  • February 28, 1955

    Report by the Measurement Lab of the USSR Academy of Science, 'On the Properties of the Atomic Bombs Detonated on the Marshal Islands in 1954'

    Soviet scientific intelligence report on U.S. nuclear weapons testing on the Marshall Islands in 1954. This report concludes that the Ivy Mike and Castle nuclear detonations were thermonuclear based on gamma ray spectroscopy of fission fragments collected by Soviet aircraft over the USSR and PRC.

  • March 01, 1955

    Pravda Newspaper Article on the Decision of the Presidium of the Supreme Soviet Concerning the USSR CM [Council of Ministers]

    Pravda announces the decisions made by the Presidium of the Supreme Soviet.

  • April 21, 1955

    Letter to Z. P. Zaveniagin, 'Regarding the Choice of Devices for Strategic Use'

    Report describing the relative merits of the RDS-27 and the SD nuclear weapon designs for use on the R-7 "Semyorka" ICBM.

  • May 18, 1955

    Minutes of the Meetings on 22 and 25 April 1955 at the French Ministry of Foreign Affairs under the direction of Mr. Massigli

    This collection of minutes details a dicussion on the possiblity of an extension and futher integration of European politics and economies.

  • May 26, 1955

    Proposal Concerning the Testing of an Experimental System for the Verification of the Casing Design

    Proposal to develop a test warhead using radiation implosion to induce a thermonuclear reaction. The proposal emphasizes that the device will be compatible with the existing R-7 ICBM delivery system.

  • June 30, 1955

    Letter from Iu. B. Khariton to N. I. Pavlov Regarding the Testing of a Nuclear Weapon at Object 700

    The letter describes geographic, safety, and technical considerations taken into account when selecting a test site for the RDS-37 hydrogen bomb. Specifically, the letter highlights that a testing field should be chosen based on the existence of population centers, the terrain, and the main wind patterns.

  • July 01, 1955

    Report by the Commission on the Review of the Scientific Principles of Atomic Compression and the Data on the Experimental Device RDS-37

    A report on the design of the RDS-37 nuclear device and the implications of radiation implosion induced nuclear fusion on weapons design.

  • 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.

  • January 01, 1956

    Twenty-First Session of the United Nations General Assembly, 'Agenda Items Relating to Disarmament'

    Summary of the Twenty-First Session of the United Nations General Assembly's agenda on disarmament

  • 1956

    South African Cabinet Memorandum, Research in the Field of Nuclear Energy and Exchanging Information with Friendly Nations

    South African Cabinet memorandum discussing the potential for nuclear cooperation and technology assistance from various friendly countries, including the United States, Great Britain, and the Netherlands.

  • February 02, 1956

    Note Containing an Assessment of the Parameters of a Device with Yields of 150 Megatons and One Billion Tons of TNT

    A report on the material requirements and design specifications of nuclear devices with yields of 150MT and one milliard tons TNT between Soviet officials. Specifically, the use of lithium-6 deuteride and natural uranium in varying degrees is discussed.

  • February 28, 1956

    Draft minutes from Conference of Foreign Ministers of the ECSC on 11 and 12 February 1956

    These minutes include discussions of a new system to bring widespread technical renewal of European industry.

  • April 21, 1956

    Note by the CC CPSU Regarding the Arming of R-7 Rockets with a Hydrogen Charge on the Basis of the Principle of Radiation Implosion

    Proposal on the development of the R-7 rocket to carry a new RDS-6 type device between Soviet officials in the Central Committee of the Communist Party of the Soviet Union. The updated R-7 rocket with RDS-6 device was approved to be designed lighter and given a bigger yield.

  • April 23, 1956

    Chinese Communist Party Central Committee Circular concerning the Transfer of Cadres and Workers to Participate in Atomic Energy Development Work (Excerpt)

    A Chinese Central Committee circular stresses the need for China to develop a healthy uranium prospecting and mining industry, and to transfer technical and administrative cadres to work with Soviet experts.