National Security Advisor Henry Kissinger updates President Nixon on the status of the Four Power Berlin negotiations between the Soviet Union, East Germany, West Germany, and the United States.

A memorandum for President Nixon from National Security Advisor Henry Kissinger on the current status of West German Chancellor Willy Brandt's "Ostpolitik" or Eastern Policy, which sought to normalize relations between West Germany and the communist countries.

Khrushchev response to Ulbricht's 15 September letter regarding the closing of the border between east and west Berlin. He notes that since the Western powers were tending toward negotiation rather than confrontation over the crisis, "such steps which could exacerbate the situation, especially in Berlin, should be avoided."

Ulbricht speaks at the Moscow Conference of Secretaries of the Central Committees of the Communist and Workers' Parties of Socialist Countries for the Exchange of Opinions on Questions Concerning the Preparation and Conclusion of a German Peace Treaty.

Ambassador Pervukhin sends the views of the Soviet embassy in East Germany regarding the negotiation of a peace treaty between East Germany and the Soviet Union. It notes that "the most difficult issues which will arise after signing a peace treaty are the practical exercise by [the] GDR organs of effective control over the links between West Berlin and the FRG and the establishment of a regime over the movement of the population between West and Democratic Berlin."

Ambassador Pervukhin reports to Russian Foreign Minister Gromyko on the position of the East German government regarding the possibility of a peace treaty between the Soviet Union and East Germany and a resolution to the ambiguous status of Berlin. The report also discusses the possibility of enforcing better border controls between east and west Berlin in order to "close 'the door to the West.'"

CIA Memorandum for President Truman on US position on Soviet actions in Berlin.

Summarizes Soviet objectives and strategies in entering into Four-Power discussions about Berlin and Germany.

1973 agreement between the Stasi and the KGB outlining their cooperative efforts to fight "ideological subversion" and uncover "the hostile plans of the enemy." Both secret services would also exchange information gathered by their espionage activities and provide mutual support in infiltrating agents. Of particular mutual interest was espionage against the Federal Republic of Germany and West Berlin. To this end, the KGB was permitted to recruit East German citizens, and the MfS would secure their ongoing contacts.

Selected excerpts from Khrushchev's concluding speech at a conference of Warsaw Pact leader, focused on the building crisis over the status of Berlin.