Intelligence reports about recent visits to Beijing by Pakistani defense and science officials raised questions whether China was or would be providing nuclear aid to Pakistan. The latter was already developing close relations with China, a matter which was of great concern to U.S. policymakers, but INR analyst Thomas Thornton concluded that Pakistan was highly unlikely to seek a significant degree of Chinese nuclear assistance.

This study begins, as the National Security Council requested, by assuming that the September 22, 1979 Vela event was a nuclear detonation. It discusses the possibility that the detonation could have occurred due to an accident, and noted the Defense Intelligence Agency’s suggestion that the Soviet Union might have had reasons to conduct a covert test in violation of its treaty commitments. But most of the study is concerned with other possibilities to explain the incident – a secret test by South Africa or Israel, or India, or Pakistan, or a secret joint test by South Africa and Israel. The 2004 version, in some instances, contains more information through page 10 than the 2013 version.

This study begins, as the National Security Council requested, by assuming that the September 22, 1979 Vela event was a nuclear detonation. It discusses the possibility that the detonation could have occurred due to an accident, and noted the Defense Intelligence Agency’s suggestion that the Soviet Union might have had reasons to conduct a covert test in violation of its treaty commitments. But most of the study is concerned with other possibilities to explain the incident – a secret test by South Africa or Israel, or India, or Pakistan, or a secret joint test by South Africa and Israel. The 2013 release (which is currently under appeal) includes some information from a “Secret Test by Others” (Pakistan, India) and the map on page 12 that had not been released before.

This issue includes an extract from a recent study on Pakistan and two highly technical articles relating to on-going research to identify the signatures of high explosives used for the implosion method of nuclear detonation. It also includes a report that utilized open literature and classified intelligence, including two satellite photographs, the purpose of the article is to illuminate how the South African Government intended to use the site, down to the depth and thickness of the bore holes.

This heavily excised report on the “well-educated committed cadre” that managed the Pakistani nuclear program demonstrates how the CIA protects its intelligence on Pakistani nuclear activities. This is the same version of the report that can be found on the Agency’s FOIA Web page; the recent version includes no new information. Details on Khan Research Laboratories and the gas centrifuge program are entirely withheld, but some information is made available on the Pakistani Atomic Energy Commission and the Directorate of Nuclear Fuels and Materials. The latter includes details on the status and purpose of major projects, for example, the Kundian Nuclear Complex, also known as the Chasma Reprocessing Plant, which was not completed until 1990. For the purposes of producing plutonium for weapons, the Pakistanis were interested in a heavy water moderated reactor of the NRX (National Research Experimental) type that Canada built at Chalk River. In 1985, the Pakistanis started that project in earnest, with construction beginning in 1987 of what became known as Khushab Chemical Plant II.

With proliferation becoming a “greater threat to US interests over the next five years,” intelligence analysts believed that the “disruptive aspect of the proliferation phenomenon will constitute the greater threat to the United States.” While the estimators saw “low potential” for terrorist acquisition of nuclear weapons, the likelihood of terrorist/extortionist hoaxes was on the upswing. Significant portions of the NIE are excised, especially the estimate of Israel’s nuclear arsenal and its impact in the Middle East. Nevertheless, much information remains on the countries of greatest concern: Iraq and Libya in the Near East, India and Pakistan in South Asia, Brazil and Argentina in Latin America, and the Republic of South Africa, as well as those of lesser concern: Iran, Egypt, Taiwan and the two Koreas.

With nuclear proliferation a policy priority for the Jimmy Carter administration, and Pakistan already a special concern, the possibility that China and Pakistan were sharing nuclear weapons-related information began was beginning to worry US government officials. These concerns did not go away during the Reagan administration. While nuclear proliferation was not a top priority, the administration was apprehensive about the implications of the spread of nuclear capabilities and that China may have been aiding and abetting some potential proliferators by selling unsafeguarded nuclear materials.

Short report on a recent Pakistani missile test based on information from an Indian official. India does not believe Benazir Bhutto's statement that Pakistan's nuclear program is peaceful. Includes speculation on China's involvement in the program. Pakistan has also approached contacts in Hungary about obtaining nuclear technology.

Short report on India's response to Pakistan's purchase of a nuclear reactor from China.

Short analysis of Pakistani President Zia-ul-Haq's upcoming visits to China and North Korea, with discussion of the Soviet invasion of Afghanistan and Pakistan's nuclear program.