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Digital Archive International History Declassified

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  • November 28, 1945

    Beria’s Cover Memo to Stalin on Niels Bohr

    Memo to Stalin discussing Beria’s efforts to obtain information from physicist Niels Bohr about development of the atomic bomb.

  • 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.