The Project for the CTBT supports the work of NGOs and experts to build public and policymaker understanding of the CTBT.

In 1996, the United States was the first nation to sign the Comprehensive Nuclear Test Ban Treaty (CTBT), which “prohibits any nuclear weapon test explosion or any other nuclear explosion.” The CTBT helps curb the spread of nuclear weapons and establishes a global monitoring network to detect and deter cheating. The time for the CTBT is now.

Project News

Recent Ratifications: Zimbabwe and Thailand

By Cole Falkner 

This past week, the Comprehensive Test Ban Treaty (CTBT) has re-emerged in the international spotlight. On Wednesday, February 13, 2019, the Republic of Zimbabwe deposited its instrument of ratification of the CTBT to the United Nations. Zimbabwe’s accession to ratification status of the treaty follows the Kingdom of Thailand’s realization of ratification on September 25, 2018. 

UN General Assembly Statements and Resolution Supporting CTBT

By Cole Falkner 

On November 26, 2018, the Seventy-Third Session of the UN General Assembly met in New York, where the “Cooperation between the United Nations and the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization [CTBTO]” resolution was adopted.  

Australia's CTBTO Monitoring System Fully Certified

By Cole Falkner 

As of November 19, 2018, Australia’s International Monitoring System(IMS) stations for the Comprehensive Test Ban Treaty Organization (CTBTO) are “operational and certified”. The operability of Australia’s twenty-one systems marks significant progress toward the CTBTO’s mission to establish 337 stations throughout the world that monitor for nuclear tests. Today, nearly 90% of stations are in service and certified against the CTBTO’s standards.  

Governments and NGOs Mark the International Day Against Nuclear Tests

By Alicia Sanders-Zakre

August 29 marks the eighth international day against nuclear tests. Less than ten countries have tested over 2,000 nuclear weapons since the United States exploded the first nuclear weapon in New Mexico on July 16, 1945. The day against nuclear tests was declared by the United Nations General Assembly in December 2009, when it adopted Resolution 64/35. The resolution was introduced by Kazakhstan to commemorate the 1991 closure of the Semipalatinsk testing site. The day is observed each year by events around the world, including symposia, conferences, exhibits, competitions, publications, lectures in academic institutions, and media broadcasts.