"All things must pass, all things must pass away. Sunset doesn't last all evening. A mind can blow those clouds away. Now the darkness only stays the nighttime; in the morning it will fade away. It's not always going to be this grey; all things must pass, all things must pass away." - George HarrisonAll Things Must Pass - A George Harrison Tribute
In an interview with Haaretz , Cohen stated, "There was a secret even before there was anything to hide. Some students were sent overseas to study nuclear physics, and a group started to look for uranium in the Negev. There was none. Nonetheless, this small group, which merely had a vision, already maintained a cult of secrecy. In those years, there was not yet an international regime against nuclear proliferation - this was a decade before the nuclear Non-Proliferation Treaty. But even then, when theoretically anything was allowed, there was a sense of taboo. That the subject could not be discussed. David Ben-Gurion and Shimon Peres understood that in this sphere you don't really want to state your objectives precisely. The sense was that designating goals would, in itself, stir an argument, and that it was better to avoid such debates, both internal and external. The idea was that it was crucial not to raise these questions. I read materials that are kept in archives around the world or are in memoirs. In particular, I carried out a large number of interviews and conversations with people. In my opinion, I have not written anything that harms the State of Israel; perhaps some things will help it." 
An American academic, Sasha Polakow-Suransky, also researched archives and memoirs and wrote in The Unspoken Alliance: Israel's secret alliance with Apartheid South Africa that Israeli officials "formally offered to sell South Africa some of the nuclear-capable Jericho missiles in its arsenal" and that PW Botha, South Africa's defense minister asked Shimon Peres-who was then Israel's defense minister-for nuclear warheads.
Peres offered them "in three sizes" which are understood as conventional, chemical and nuclear weapons.
The two signed a broad-ranging agreement governing military ties between the two countries that included a clause declaring that "the very existence of this agreement" was to remain secret.
On 4 June 1975, Peres and Botha met in Zurich and by then, the Jericho project had been renamed Chalet. The top-secret minutes of that meeting recorded that:
"Minister Botha expressed interest in a limited number of units of Chalet subject to the correct payload being available"Minister Peres said the correct payload was available in three sizes. Minister Botha expressed his appreciation."