Search in
ADD SEARCH FILTER CANCEL SEARCH FILTER

Digital Archive International History Declassified

SEARCH RESULTS

  • March 25, 1955

    Information on Turkish Intelligence Interest on the Uranium Mine Buhovo

    Turkish intelligence agents are trying to gather information on the uranium mining in southwest Bulgaria. They believe that the extracted deposits are shipped to the Soviet Union for further processing and production of nuclear bombs.

  • 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 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 10, 1955

    Central Intelligence Agency Information Report, 'The Development of an Ultra-Centrifuge at the Nuclear Institute of Manfred von Ardenne in Sinop'

    CIA report describing the construction process of ultra-centrifuges in the Soviet nuclear institute of Sinop and the personnel working there.

  • 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.

  • 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.

  • 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.

  • March 22, 1957

    Memorandum from the Soviet Government to the Chinese Government on the Arms Reduction Issue

    A memorandum from the Soviet government to the Chinese updating them on the arms reduction talks, a key component of which was a prohibition of the testing of atomic and hydrogen weapons. The Soviet proposal also called for reductions in conventional weapons and the prohibition of installing nuclear weapons outside their territorial borders.

  • 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.

  • 1958

    Information about Conducting in Ukraine of Month’s Campaign of Joint Actions of the People against the Nuclear Weapon and for Universal Prohibiting of the Nuclear Tests for Ever and Ever

    This document describes the monthly anti-nuclear campaign held in Ukraine from September to October, 1958. During this campaign, a number of mass meetings were organized. In this meetings, scientists lectured on the damage of nuclear tests and danger of nuclear war. The lecturers argued that only western states were responsible for conducting nuclear tests and initiating the nuclear arms race, and that the Soviet Union was forced to develop its nuclear capabilities to protect socialist countries, even though the Soviets support the idea of prohibiting the nuclear weapon.

  • April 04, 1958

    Letter from Nikita Khrushchev to Zhou Enlai on the Prohibition of Nuclear Testing

    Khrushchev writes to Zhou outlining the Soviet Union's argument for the need to halt the testing of atomic weapons, and urges the Chinese to support and agree to the ban.

  • May 15, 1958

    Central Intelligence Agency, Scientific Intelligence Research Aid, 'A Technical Evaluation of the Soviet Nuclear Power Program'

  • August 03, 1958

    Fourth Conversation between N.S. Khrushchev and Mao Zedong, Hall of Qinjendiang [Beijing]

    Mao and Khrushchev discuss the building of American bases around the Soviet Union, nuclear weapons testing and President Eisenhower.

  • 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.

  • 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.

  • February 18, 1960

    Hugh S. Cuming, Director, Office of Intelligence and Research, to Secretary of State, 'Growing Revelation of West German Interest in Nuclear Striking Force in Europe'

    This State Department intelligence report touched upon a key issue for West German policy: a desire to upgrade West Germany’s nuclear role without putting it in control of nuclear weapons. According to the Bureau of Intelligence and Research (INR), the West Germans faced a “dilemma” because of the development of Soviet strategic missile capabilities.

  • March 21, 1960

    Journal of Soviet Ambassador in the DPRK A.M. Puzanov for 21 March 1960

    Pak Seong-cheol and Puzanov discuss the presidential elections in South Korea and the Ten Nation Committee on Disarmament.

  • June 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.