This lengthy report was State Department Bureau of Intelligence and Research's contribution to the first National Intelligence Estimate on the nuclear proliferation, NIE 100-6-57. Written at a time when the United States, the Soviet Union, and the United Kingdom were the only nuclear weapons states, the “Fourth Country” problem referred to the probability that some unspecified country, whether France or China, was likely to be the next nuclear weapons state. Enclosed with letter from Helmut Sonnenfeldt, Division of Research for USSR and Western Europe, to Roger Mateson, 4 June 1957, Secret

With an approach to the Soviets already in the works, Kissinger’s top advisers emphasized the importance of a parallel approach to the French, given their centrality to the prospects for a suppliers’ group. While no one could be sure whether the French would abandon their “case-by-case” approach to nuclear exports, the advisers believed that the French disliked nuclear proliferation and wished to remain the only nuclear weapons state in Western Europe.

Helmut Sonnenfeldt informs Kissinger that France has made a direct request to the Pentagon for technical assistance with their ballistic missile program. Attached to the memo is a series of correspondence between Deputy Secretary of Defense Packard and the Director of Defense Research and Engineering, John S. Foster. Foster proposed that he meet with the French Minister of Armaments.

Sonnenfeldt describes for Secretary Kissinger the state of US-French relations after a schism developed in the wake of the 1973 October War, and what impact this would have on the two countries' nuclear cooperation.

Sonnenfeldt summarizes various recent types of military cooperation between the United States and France. These include cooperation on contingency plans for dealing with Germany and US nuclear assistance to France. He suggests that it is time to define the "political philosophy underlying these disparate measures of cooperation."

Description of a meeting between Sonnenfeldt and Jean-Laurens Delpech, French Minister of Armaments. Delpech was concerned about the slow response to the French requests for further nuclear assistance. Sonnenfeldt explained that they were awaiting a detailed technical analysis of the requests and limitations of US policy. Delpech also raised the issues of French use of the Nevada Test Site. Attached to the memorandum is a handwritten letter by Delpech to National Security Advisor Brent Scowcroft.

Laird has made four practical recommendations on how to proceed with French/US nuclear relations. Laird's four points involve information on nuclear effects simulator types, the sale of small simulators, general hardening technology, and/or ABM intelligence. The US has given as much technical assistance as possible thus far within the current guidelines, and it is up to the president to address the issues related to changes in policy to continue the assistance. He is urged to consider especially the impact such aid would have on relations with the UK and the Soviet Union, but we should not cut off all assistance while these issues are being addressed.

Sonnenfeldt worries about documents concerning French nuclear aid passing through so many hands that their security is at risk; Kissinger is to tell Richardson to be as discrete as possible. Richardson has recently sent Galley information on the new areas of U.S. aid to France and of the talks that will be used to implement such aid. He informs Galley that we are willing to go ahead on the four areas recommended by his predecessor Laird: information on nuclear effects simulators; sales of small simulators; hardening technology; and ABM intelligence.

Description of conversation between Sonnenfeldt and Jean-Laurens Delpech, French Minister of Armaments, on October 7. Delpech asked about the status of US nuclear assistance to France. He specifically asks about French requests for testing of reentry vehicle material in US nuclear tests, the importation of advanced computers, technical assistance with booster trigger design, and information on submarine vulnerabilities. Other topics included the French sale of helicopters to China and the potential sale of ECM equipment to Arab states.

When meeting with the French Defense Minister Kissinger is to stress how much the U.S. has supported France despite negative views on such assistance by European countries and by Congress, and that this president could not be more sympathetic to French needs. The NSSM 175 review of the policy towards France is attached, and it reviews previous aid given to France, complications that arouse due to restrictions on such aid, and what the French are now requesting. It extensively reviews missile assistance, nuclear safety exchanges, and other French aid issues. The second part addresses the issue in light of U.S.-European political relations, and the effect any such aid might have on such relations. It notes that future French aid might be given to hardening technologies, and to aiding in Poseidon information, and to underground nuclear testing, and it weighs the pros and cons in the eyes of the British. It concludes with an overview of how such aid could be in the interest (or not) of the U.S., but several parts of the last part of this document are blacked-out, marked for secrecy.