Israeli Cover Stories about the Dimona Reactor Dismayed Top Level Officials Who Saw a "Clearly Apparent Lack of Candor"
U.S. Embassy Telegram Quotes Ben-Gurion Aide That It Was a "Stupid Mistake" by Israel to Cloak the Nuclear Project in Secrecy
To Prevent Military Uses of the Facility, U.S. Officials Believed the International Atomic Energy Agency Should Monitor Dimona (It Never Has)
Today's Posting Inaugurates the National Security Archive's Special Web Site on Israeli Nuclear History
Washington, D.C., April 15, 2015 – The U.S. government first learned of Israel's secret nuclear program at Dimona from an American corporate official talking to U.S. diplomats in Tel Aviv during mid-summer 1960, according to a declassified document published today for the first time by the National Security Archive, the Nuclear Proliferation International History Project, and the Center for Nonproliferation Studies of the Middlebury Institute of International Studies at Monterey. Other documents published today detail the discovery of the secret project that some in the U.S. government believed from the very start aimed at a weapons capability; the U.S. debates over Israel's lack of candor; and U.S. government efforts to pressure the Israelis to answer key questions about the nature of the Dimona project.
This "discovery," which came as the presidency of Dwight D. Eisenhower was drawing to a close, caused apprehension in Washington by raising concern about regional stability and nuclear proliferation, but it also produced annoyance because Israeli officials at all levels repeatedly provided less than credible answers to U.S. questions about Dimona. Thus, in September 1960, when embassy officials asked about a new construction site when they were on a helicopter ride nearby, an adroit Israeli official, Addy Cohen, improvised a story to keep the secret: it was the site of a textile factory, he said; a story that was not wholly false because there was a textile plant near Dimona. An interview with Addy Cohen detailing the episode appears in this posting for the first time.
Documents published in this collection shed light on a particularly notable intelligence failure: how Washington missed warning signs that the Israelis had a nuclear project underway, but also how the U.S. belatedly realized what the Israelis were doing, and how Eisenhower and his senior advisers reacted to this discovery. Among the documents are:
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