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June 4, 1957

Department of State Office of Intelligence Research, 'OIR Contribution to NIE 100-6-57: Nuclear Weapons Production by Fourth Countries – Likelihood and Consequences'

This lengthy report was State Department Bureau of Intelligence and Research's contribution to the first National Intelligence Estimate on the nuclear proliferation, NIE 100-6-57. Written at a time when the United States, the Soviet Union, and the United Kingdom were the only nuclear weapons states, the “Fourth Country” problem referred to the probability that some unspecified country, whether France or China, was likely to be the next nuclear weapons state. Enclosed with letter from Helmut Sonnenfeldt, Division of Research for USSR and Western Europe, to Roger Mateson, 4 June 1957, Secret

December 27, 1962

Rodger P. Davies to Phillips Talbot, 'Second Inspection of Israel's Dimona Reactor'

Summary of second US inspection of Dimona. Although inspectors "were taken to Dimona without advance notification, [and] they had spent only a short time there," they felt that "the visit was satisfacotry in that the AEC technicians could confirm that the reactor is not a power reactor but rather a large research reactor.

October 23, 1962

Department of State Memorandum of Conversation, 'Second U.S. Visit to Dimona Reactor'

Results of second US visit to Dimona discussed.

October 22, 1962

State Department Telegram 451 to US Embassy Egypt

State Department reports that a second US visit to Dimona reaffirmed previous view that there was no evidence of preparations for nuclear weapons production.

September 18, 1962

William Brubeck, Executive Secretary, to McGeorge Bundy, 'Second Visit by U.S. Scientists to the Dimona Reactor'

Memorandum summarizing response to US requests for a second visit to Dimona.

September 14, 1962

Department of State Memorandum of Conversation, 'Proposed Visit of U.S. Scientists to the Dimona Reactor'

Delay in response to US request for a second visit to Dimona.

July 11, 1962

State Department Telegram 233 to US Embassy Egypt

UAR officials express concern regarding the Israeli nuclear program.

June 22, 1962

Department of State Memorandum of Conversation, 'A Second Visit by U.S. Scientists to Israel’s Dimona Reactor'

Ambassador Harman responds favorably to the suggestion of another US visit to Dimona.

June 22, 1962

Robert C. Strong to Phillips Talbot, 'Another Visit to Israel’s Dimona Reactor'

Unable to arrange visits from a "neutral" country, the State Department proposes another US visit to Dimona.

February 12, 1962

Department of State Memorandum of Conversation, 'Israel’s Atomic Energy Program'

British response to State Department reply regarding controls over Israel nuclear program.

Pagination