In response to Mallaby's letter, Reid dismisses the American explanation for the South African Kalahari nuclear testing facility. He believes that the South Africans "feel increasingly threatened and foresee a possible need to use nuclear weapons in their own defence if it should come to that."

Nye stated that at present the United States preferred to "concentrate on pressing South Africa to adhere to the NPT rather than continuing to enquire about the nature of the Kalahari facility." The State Department assessment was that while South Africa was capable of building a bomb at short notice, they did not actually plan to test one at this time.

Mallaby outlines the UK position on South African accession to the Non-Proliferation Treaty.

Extract from a speech during which South African Prime Minister Vorster discusses Soviet allegations that South Africa has developed a nuclear bomb.

Memorandum on UK position at Lagos Conference on Apartheid about Soviet allegations of South African nuclear weapons development.

J.S. Wall of the UK Foreign and Commonweath Office reports on a conversation with David Aaron of the US National Security Council on concerns about South Africa's possible nuclear testing facility in the Kalahari desert.