Responding to the report from the US Embassy in Argentina, the State Department asked it to obtain as much information as possible on the end-use of uranium sold to Israel, and in particular on the issue of safeguards.

The interim report from the US Embassy in Buenos Aires, filed just past the 1 September deadline, confirms the sale of 100 tons of yellow cake uranium to Israel over the course of a three-year period, beginning 1 January 1963. The uranium was to be used solely for the peaceful use of nuclear energy.

This joint State Department and CIA message reported an unconfirmed intelligence of an Argentine-Israeli agreement on 3 November 1963, and requested information on the specifics of the deal by 1 September 1964.

Peter Ramsbotham, chief of the chancery at the British Embassy in France, passed along information to the US Embassy about his meeting with George Soutou, a senior official at the French Foreign Ministry. While the French by then did not want Israel to acquire nuclear weapons, they believed that the Israelis were seeking them.

According Jacques Martin, a French Foreign Ministry expert, the Israelis were demanding to know why the French were holding up uranium shipments. The French replied that until Israel was ready to purchase only from France, allowing France “some control over the situation” [in Dimona], the restrictions would continue.

This telegram, sent through the special “Roger channel” used for intelligence subjects, refers to an earlier embassy message, number 2319, dated November 12, 1963, which has yet to be found at the US at the National Archives. That telegram may refer to French actions to halt the supply of uranium to Israel which were alluded to indirectly in this message. Jacques Martin, a French Foreign Ministry expert on nuclear matters, told US embassy officials that the Israelis, who had refused to sign an agreement to purchase uranium exclusively from France, were looking for other sources, most likely Belgium and Argentina.

This memorandum from Executive Secretary Benjamin Read of the Department of State to National Security Advisor McGeorge Bundy provides a valuable chronology of the US discovery of the nuclear reactor project at Dimona and the pledges made by the Israelis in response to requests from the United States. Included in the chronology is an item about a meeting on 25 May 1963 where senior French diplomat Charles Lucet told CIA director John McCone that even though the French had helped build the Dimona reactor, “there might be a nuclear complex not known the French.” Lucet further stated that the Israelis had tried to purchase “safeguard-free” uranium from Gabon but that the French government stopped the sale through preemptive purchases.