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Digital Archive International History Declassified

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  • October 09, 1945

    TASS News Summary

    Stories include disputes in the US about putting the atomic bomb under international supervision, a speech by Truman on the atomic bomb, British conservative party politics, the dissolution of the national assembly in Portugal, elections in Budapest, and a speech by British Foreign Secretary Bevin on the conference of ministers of foreign affairs.

  • November 28, 1945

    The Interrogation of Niels Bohr

    At the end of October 1945 two NDVD employees of the “S” Department for atomic intelligence activities were sent to Denmark to establish contact and speak with Niels Bohr. They managed to meet Bohr at his institute twice, on 14 and 16 November 1945, and obtained answers to 22 questions on constructing a nuclear reactor and the atomic bomb.

  • December, 1945

    Kurchatov’s Evaluation of Niels Bohr's Questioning

    Evaluation by the scientific director of the Soviet nuclear project, Igor Kurchatov, of the interview with Niels Bohr.

  • April 14, 1950

    National Security Council Report, NSC 68, 'United States Objectives and Programs for National Security'

    On US national security policy at the beginning of the Cold War. Includes an assessment of the conflict between the United States and the Soviet Union, as well as US and Soviet nuclear weapons capabilities.

  • 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.

  • 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.

  • May 16, 1956

    Bhabha and Jawaharlal Nehru Correspondence on Indian Nuclear History

    A series of letters between Dr. Bhabha and Prime Minister Jawaharlal Nehru covering a wide range of subjects, including the appropriate venues to voice opinions, the status of the Colaba site, meeting with the Pakistan Association for the Advancement of Science, and issues with coordination between the Ministry of Natural Resources and the Ministry of Education on scientific research and education. Also includes a copy of a letter from The Tokyo Shimbun requesting Dr. Bhabha’s presence at a forum discussing the justifiability of American hydrogen bomb tests in the Pacific.

  • May 20, 1957

    Report No. 118 from Young Kee Kim to Syngman Rhee

    Young Kee Kim briefs President Rhee on the increasing number of American arms in the Far East and the immigration issue between China and Philippines in Formosa.

  • December 10, 1957

    Letter, Nikolai Bulganin to Dwight D. Eisenhower

    Bulganin proposes a halt on nuclear tests among the United States, the Soviet Union, and the United Kingdom beginning on January 1, 1958.

  • October 28, 1958

    Cable from the Chinese Embassy in the Soviet Union, 'Gromyko Discussed the Issue of Stopping Nuclear Weapons Tests'

    Gromyko informs Liu Xiao of the Soviet position and strategy in its negotiations with the United States and the United Kingdom for halting nuclear tests.

  • December 07, 1959

    C. L. Marshall, Director, Division of Classification, to A. A. Wells, Director, Division of International Affairs, 'Cooperation in the Field of Gas Centrifuge'

    US Atomic Energy Commission classification director C. L. Marshall explains to international affairs director A. A. Wells that the design for the gas centrifuge must be classified for fear of providing an “unfriendly nation” a low-energy consuming method for “the separation of heavy isotopes…an important part of a [nuclear] weapons program.”

  • February 10, 1960

    Journal of Soviet Ambassador in the DPRK A.M. Puzanov for 10 February 1960

    Kim Il reports on food and oil supplies from the Soviet Union, the introduction of nuclear weapons to South Korea, and suggest concluding a treaty of alliance, friendship and mutual aid between the USSR and the DPRK.

  • March 22, 1960

    Journal of Soviet Ambassador in the DPRK A.M. Puzanov for 22 March 1960

    Puzanov and Pak Seong-cheol comment on the introduction of nuclear weapons to South Korea by the United States.

  • March 23, 1960

    Journal of Soviet Ambassador in the DPRK A.M. Puzanov for 23 March 1960

    Kim Tae-hui briefs diplomats in Pyongyang on U.S.-South Korea military relations and the 1960 elections in the ROK.

  • July 13, 1960

    Report on SHAPE meeting

    Analysis by the Head of the Italian Delegation to the North Atlantic Council (Alessandrini) of SHAPE meeting chaired by Gen. Norstad to examine Western/Soviet missile balance.

  • May 15, 1961

    Telegram by Ministry of Foreign Affairs, Directorate General for Political Affairs and Security (DGAP) to Minister of Defense, 'Opinion sharing between Brosio-Acheson on NATO nuclear weaponry '

    This document is related to Brosi's discussion with Acherson on NATO nuclear weaponry and strategy. Brosio underlines how the American nuclear strategy is rejected by European countries. Most of them are skeptical and take distance from Americans' willingness to use nuclear weapon against their enemies. In this sense, Acherson as representative of the American government, is ready to discuss the topic at a multilateral level.

  • May 30, 1961

    Memorandum by Chief of Defense Staff Aldo Rossi to Minister of Defense Andreotti, 'NATO new strategic approach'

    Rossi describes the recent trend of the US Administration to want to turn away from the doctrine of Massive Retaliation, towards the acquisition of a new strategic concept that includes an increase in the "nuclear threshold." In order for Italy to continue to lead the defense of central and southeastern Europe against the Soviet Union as well as address its internal social and political crises, the United States must provide Italy with financial assistance.

  • October 15, 1961

    Polish Report on International Radio Transmissions

    Report on the West's radio transmissions, including: NATO's torpedo activity in the Baltic Sea and the US plans to help strengthen Western navies in the region; US troop movements into Europe due to the Berlin Crisis; US tests of intercontinental ballistic missile "Titan"; exercises of Operation Skyshield and Polaris A-2, among many other missile tests

  • February 21, 1962

    Research Memorandum RSB-58 from Roger Hilsman to the Secretary, 'Probable Soviet Reaction to Establishment of Multilateral NATO-Controlled MRBM Force'

    As discussion of a NATO multilateral force (MLF) unfolded, unfolded, one question which had to be addressed was how the Soviet Union would respond to the creation of such a NATO force. Because a NATO force would increase Western military capabilities, Soviet opposition was assumed.

  • April 25, 1962

    Rajya Sabha Q&A on the Export of Nuclear Weapons and Proliferation

    Transcript of questions and answers between members of the Rajya Sabha and the Minister of State in the Ministry of External Affairs, Shrimati Lakshmi Menon, on the Indian government's opposition to United States export of nuclear weapons.