Elie Geisler received training as a radiation-safety officer while serving as a solider at Dimona from 1964 to 1966. As the crisis escalated in late May 1967, Geisler was summoned to meet the head of the Minhal Madaii—the secret scientific administration in charge of the nuclear project—who gave him a special assignment: guarding a radioactive “package” to be placed under heavy security. The following testimony was relayed to Avner Cohen through several interviews and follow-up conversations and email exchanges.

Referring to Goodison and Kellas' correspondence, Treweeks states that evidence shows that the Canadian report concerning an Argentine-Israeli uranium deal was incorrect and that there is little evidence for an Israeli plutonium separation facility.

In response to Alan Goodison's April 29 letter, which referred to evidence for an Israeli plutonium separation facility, Arthur Kellas, counselor to the British Embassy in Tel Aviv, states that the British Embassy had “not seen such evidence [for a separation facility] and should be grateful to know what it is."

In a letter to Arthur Kellas, counselor at the British Embassy in Tel Aviv, Alan Goodison of the Foreign Office's Eastern Department disclosed the Argentine-Israel uranium deal, which involved the transfer of 80-100 tons over 33 months. Since evidence suggested that Israel had facilities for plutonium separation, they estimated that there would be enough plutonium for a weapon within 20 months; however, Goodison had no proof that the Israelis planned to produce a nuclear weapon, only that they had the capability to do so. Minutes are attached.

After analyzing photographs taken of the Israeli nuclear facility at Dimona, J. Koop, a career intelligence analyst at Canada's Defence Research Board, concluded in March 1964 that Dimona had all of the "prerequisites for commencing a modest nuclear weapons development project." When the Dimona reactor went critical, it could produce enough plutonium for at least one implosion device by the end of 1965 and increase its operating level to produce one to two per year by 1966. Arthur Kellas, a British diplomat in Israel, wrote in his forwarding letter that they were highly impressed by the analysis.