Comprehensive Test Ban Treaty (CTBT) Timeline

1. 1945 - Atomic bombs are used by the United States against Japan.
2. 1992 - September - The United States conducts its most recent nuclear test, "Divider."
3. 1992 - October - U.S. imposes restrictions on nuclear testing, Russia extends test moratorium
4. 1993 - April - U.S. President Clinton and Russian President Yeltsin agreed to begin negotiations on multilateral test ban
5. 1993 - August - Conference on Disarmament mandates its Ad Hoc Committee on a Nuclear Test Ban to negotiate a CTBT
6. 1993 - October - China conducts a nuclear test.

7. February 1994 - Negotiations on a comprehensive nuclear-test-ban treaty begin in the Conference on Disarmament.

8. 1994 - June - China conducts an underground nuclear test.
9. 1994 - October - China conducts an underground nucear test.
10. 1995 - January - President Clinton says in State of Union: "The United States will lead the charge to extend indefinitely the Nuclear Non-Proliferation Treaty [and] to enact a comprehensive nuclear test ban."
11. 1995 - May - China conducts a nuclear test
12. 1995 - June - France announces it will conduct 8 nuclear tests in the next year
13. 1995 - August - France announces once it is done testing, it would support a CTBT
14. 1995 - August - China conducts a nuclear test
15. 1996 - April - Russia endorses a zero-yield CTBT and reserves the right to resume testing if Russia's supreme interests are in jeopardy. The Group of 7 and Russia pledge to sign a CTBT by September 1996.
16. 1996 - June - India states it will not sign a CTBT unless the five declared nuclear weapon states agree to give up their nuclear weapons
17. 1996 - July - U.S. and Russia announce joint support for the existing draft CTBT, though it did not fully satisfy each nation.
18. 1996 - August - China and U.S. reach agreement on modifying treaty text to resolve China's concerns over verification.
19. 1996 - August - India vetoes draft CTBT in CD, barring the treaty from going to the United Nations as a CD document
20. 1996 - August - Australia asks UN General Assembly to begin consideration of the draft CTBT
21. 1996 - September - UN General Assembly adopts the CTBT by a vote of 158-3-5
22. 1996 - September - President Clinton and other world leaders sign CTBT
23. 1996 - November - CTBT Preparatory Commission meets for the first time
24. 1998 - April - France and Great Britain are the first declared nuclear weapons states to ratify the CTBT
25. 1998 - May - India conducts five nuclear tests
26. 1998 - May - Pakistan conducts six nuclear tests.
27. 1999 - October - US Senate rejects CTBT by a vote of 48-51-1
28. 2001 - November - Conference on Facilitating the Entry-Into-Force of the CTBT begins at UN headquarters
29. 2005 - Sept - Conference on Facilitating the Entry-Into-Force of the CTBT is held at the UN headquarters