As West Germany and The Netherlands developed ultra-centrifuges without a classification policy, the AEC discuss ways to keep the technology under wraps without arousing suspicion from the other members of Euratom.

A Union Carbide Nuclear Company study to determine how quickly and easily foreign countries could develop and utilize gas centrifuges with the goal of creating nuclear weapon facilities. The study determines that, due to the cheap cost and relatively small size of the centrifuges, even un-industrialized countries such as Cuba could achieve this technology within 8 years if helped by a larger nation.

The development of the gas centrifuge method, according to this report, would make production of U-235 (and by extension, nuclear weapons) possible for as many as 20-30 foreign countries. The U.S. is thus forced to consider its strategy for how to limit proliferation despite this new, cheap technology.

US Atomic Energy Commission classification director C. L. Marshall explains to international affairs director A. A. Wells that the design for the gas centrifuge must be classified for fear of providing an “unfriendly nation” a low-energy consuming method for “the separation of heavy isotopes…an important part of a [nuclear] weapons program.”

CIA report describing the construction process of ultra-centrifuges in the Soviet nuclear institute of Sinop and the personnel working there.

Transcript of Avner Cohen's 1993 interview with André Finkelstein. Finkelstein, deputy director of the IAEA and a ranking official within the French Atomic Energy Commission (CEA), discusses Franco-Israeli nuclear technology exchange and collaboration in this 1993 interview.

Summary of a British report on problems with the export "trigger list" of the Nuclear Suppliers Group. The list did not include gray area items that could be used in building nuclear facilities. To begin correcting the problem, the British announced a ban of inverter exports and asked other governments to take parallel steps. Also includes a summary of a secret British paper on Pakistan nuclear intentions. The British believed that the “piecemeal” Pakistani purchasing efforts to acquire inverters were directly related to the building of a gas centrifuge unit for producing weapons-grade uranium. Attached to the cable is a 7 November "Memorandum for the Record" discussing sharing this information with the Department of Energy.