Which Treaty is known as the "longest sought, hardest fought prize in the history of arms control negotiations"?
The Comprehensive Nuclear-Test-Ban Treaty was thus described by U.S. President Bill Clinton. Negotiated between 1993 and 1996, it opened for signature on 24 September 1996 and was signed that same day by 71 States, including five of the eight then nuclear-armed states (i.e. all five nuclear weapon states, China, France, Russia, the United Kingdom and the United States). The CTBT created a de facto international norm against nuclear testing and extended the existing moratorium. However, it has yet to enter into force.