September 23, 1949
Statement by President Truman in Response to First Soviet Nuclear Test
Shortly after the first Soviet nuclear bomb test on August 29, 1949, United States spy planes detected evidence of radioactivity from the blast. In this statement, President Truman revealed to the public for the first time that the Soviet Union had built and successfully detonated a nuclear bomb.
January 21, 1959
Soviet Ministry of Foreign Affairs, 'Draft for Transmission to Various Heads of Government Regarding of A. I. Mikoyan's Conversations with Senior US Government Leaders'
After A.I Mikoyan's trip to the United States and his conversations with senior US government leaders, the USSR MFA submitted a draft of confidential information to be sent to the heads of government of several states. The content of the instructions to be told to the foreign leaders includes discussion of the German problem and Berlin, the problem of disarmament and a halt to nuclear testing, the Near and Middle East, the Far East, and other issues.