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

Talking points for Arms Control and Disarmament Agency Director Hollum from the State Department. Hollum was instructed to “urge” the Japanese to convey their concern to the government of India and “strong opposition [to] any such tests.” The State Department did not want to make any public statements about the situation because that “would be counterproductive,” that is, it would tip the U.S.’s hand Japan to tell Tokyo to voice its concerns over the possible Indian Nuclear Test to New Delhi.

(Excerpts) Minutes of discussions of the Warsaw Pact Political Consultative Committee concerning non-proliferation. The Romanian delegation argues against a joint declaration of the Warsaw Pact on non-proliferation for fear that it might be used against China. The other delegations argue that a joint declaration is necessary in order to prevent the creation of the Multilaterall Nuclear Force proposed by NATO.