Ethiopia this week became the 135th country to ratify the comprehensive nuclear test ban treaty (CTBT), which prohibits the explosive testing of nuclear weapons.
To enter into force, the CTBT must be ratified by 44 States listed in Annex 2 of the Treaty. So far, 34 of those States have done so.
See “Ethiopia ratifies Comprehensive Nuclear-Test-Ban Treaty,” CTBT Organization news release, August 9.
Background, history and current status of the proposed test ban may be found in “Nuclear Weapons: Comprehensive Test Ban Treaty” (pdf), Congressional Research Service, updated June 21, 2006.