But there is nothing new. This is just confirmation of what had already been well known before.
Secret South African documents reveal that Israel offered to sell nuclear warheads to the apartheid regime, providing the first official documentary evidence of the state's possession of nuclear weapons.
The "top secret" minutes of meetings between senior officials from the two countries in 1975 show that South Africa's defence minister, PW Botha, asked for the warheads and Shimon Peres, then Israel's defence minister and now its president, responded by offering them "in three sizes". The two men also 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.
The Israeli authorities tried to stop South Africa's post-apartheid government declassifying the documents at Polakow-Suransky's request and the revelations will be an embarrassment, particularly as this week's nuclear non-proliferation talks in New York focus on the Middle East.
They will also undermine Israel's attempts to suggest that, if it has nuclear weapons, it is a "responsible" power that would not misuse them, whereas countries such as Iran cannot be trusted.
South Africa eventually built its own nuclear bombs, albeit possibly with Israeli assistance. But the collaboration on military technology only grew over the following years. South Africa also provided much of the yellowcake uranium that Israel required to develop its weapons.
The documents confirm accounts by a former South African naval commander, Dieter Gerhardt – jailed in 1983 for spying for the Soviet Union. After his release with the collapse of apartheid, Gerhardt said there was an agreement between Israel and South Africa called Chalet which involved an offer by the Jewish state to arm eight Jericho missiles with "special warheads". Gerhardt said these were atomic bombs. But until now there has been no documentary evidence of the offer.
Israel pressured the present South African government not to declassify documents obtained by Polakow-Suransky. "The Israeli defence ministry tried to block my access to the Secment agreement on the grounds it was sensitive material, especially the signature and the date," he said. "The South Africans didn't seem to care; they blacked out a few lines and handed it over to me. The ANC government is not so worried about protecting the dirty laundry of the apartheid regime's old allies."