SDA Volume 4, Number 3
1945 Atomic weapons used on Hiroshima and Nagasaki
1946 Baruch plan for international control of nuclear weapons fails at UN
1958 U.S.-Soviet nuclear testing moratorium begins
1961 U.S.-Soviet nuclear testing mortatorium ends
1963 Limited Test Ban Treaty signed, bans atmospheric nuclear tests
1968 Non-Proliferation Treaty signed
1970 Non-Proliferation Treaty enters into force
1972 Anti-Ballistic Missile Treaty enters into force
1974 Threshold Test Ban Treaty signed, bans nuclear tests above 150 kilotons
1979 SALT II agreement signed, never entered into force
1987 Intermediate-Range Nuclear Forces (INF) Treaty ratified 1991 START I treaty signed
1993 START II treaty signed; START I Treaty enters into force
1995 Non-Proliferation Treaty extended indefinitely, parties pledge to achieve Comprehensive Test Ban no later than 1996.
Institute for Energy and Environmental Research
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Takoma Park, Maryland, USA
Last updated: August, 1996