This telegram made by the Brazilian Embassy in Buenos Aires, verifies U.S. pressure on Argentina’s nuclear program, especially through Canada, with whom Argentina had a strategic partnership in the nuclear field. The telegram goes into depth on factors that underlie Argentina's decision not to sign the NPT, and its efforts to import the materials necessary for its nuclear program.

This document reveals an encounter between a U.S. State Department official and an Argentine diplomat in Washington D.C., in which the U.S. diplomat suggests to his Argentine counterpart that the U.S. government would warmly welcome an initiative by Argentina and Brazil regarding mutual inspections as well as a declaration renouncing the right to develop peaceful nuclear explosives.

This is a letter written by Brazilian Congressman Herbert Levy which reveals the content of his meetings with high U.S. governmental officials regarding his concern about Argentina’s nuclear activities less than a year after the Falklands/Malvinas War. In these conversations, Levy states that Argentina might develop a nuclear artifact.

This cable summarizes Ambassador Ricupero’s mission to Argentina, where he conveyed a report that Brazil had mastered uranium enrichment. President Alfonsín’s letter of reply is included.

President Alfonsín of Argentina and President Sarney of Brazil declare their commitment to peaceful nuclear energy cooperation and mutual guarantees.

In this memorandum, General Director for Nuclear and Disarmament Affairs Adolfo Saracho reports on a Brazilian airplane's flight over the uranium enrichment plant at Pilcaniyeu.

In this cable to Buenos Aires, Ambassador Vazquez reports that he requested a meeting with Minister Olavo Setúbal after General Leonidas Pires Gonçalves suggested that he would support a Brazilian nuclear weapons program. Vazquez also discusses a conversation with the Brazilian Foreign Minister's chief of staff, who told Vazquez that General Leônidas Pires refuted the reports of a Brazilian atomic bomb.

This memo from the Argentine General Directorate of Nuclear Affairs and Disarmament to the South America Directorate proposes a joint Argentine-Brazilian declaration on the peaceful use of nuclear weapons. Rejecting the establishment of IAEA safeguards, the memo instead suggests a "mutual guarantee mechanism" based on cooperation and inspections on a case by case basis.

In his answer to Argentinian President Bignone, Brazilian President João Batista Figueiredo expresses satisfaction for the result achieved by the neighbor country.

A Directorate of Intelligence analysis, prepared in 1986, provides an interesting contrast with excisions in the NIEs on the indigenous program; it includes details on the major Navy, Air Force, and Army components of the indigenous program, including the nuclear submarine objective. As with the NIEs, the authors of this report saw no “political decision” on nuclear weapons and further noted President Sarney’s public statements against a weapons program. But a piece of political intelligence initially excised from this report suggested, rightly or wrongly, that Sarney may have been personally ambivalent.