Representatives of 71 nations sign the Comprehensive Nuclear-Test-Ban Treaty at the United Nations.

The Comprehensive Nuclear-Test-Ban Treaty (CTBT) is a multilateral treaty to ban nuclear weapons test explosions and any other nuclear explosions, for both civilian and military purposes, in all environments. It was adopted by the United Nations General Assembly on 10 September 1996, but has not entered into force, as it has not been ratified by all the required states. The treaty will establish the Comprehensive Nuclear-Test-Ban Treaty Organization to oversee monitoring, which is currently done by a Preparatory Commission.