By David Koplow
August 2004
The Comprehensive Test Ban Treaty (CTBT), signed on September 24, 1996, is the
most important arms control agreement now pending. It would create a permanent,
global, legally-binding prohibition on all nuclear explosions.
The CTBT cannot enter into force until the United States and 43 other specified
countries ratify it. To date, 41 of those countries (excluding India, Pakistan, and North
Korea) have signed the treaty; 32 of them (including Russia, France, the United
Kingdom, and all the other members of NATO) have ratified. The United States (along
with China, Israel, and Iran) has not ratified.
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