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

A series of correspondence between Brazilian Foreign Ministry and Brazilian Ambassador to the US about the transfer of nuclear material from France to Brazil. Myron Kratzer, Acting Assistant Secretary for Scientific Affairs in the US, expressed his concern over the fact the nuclear material was of American origin.

A source in President Giscard's staff informed the US embassy that Pakistan was determined to complete the reprocessing plant and was searching for another country willing to supply the necessary technology. Also discusses a developing nuclear deal between West Germany and Brazil.