Presenter: CTBT, IMS and a strong norm against nuclear testing strengthen monitoring

The presenter said the third barrier to weapons programs is nuclear testing and the international norms and monitoring that deter it. "Right now, there is a powerful global norm against nuclear testing, which is supported by the Comprehensive Nuclear Test Ban Treaty, the CTBT, and the CTBT organization's International Monitoring System, the IMS," the presenter said.

As an example of monitoring effectiveness, the presenter said: "The IMS was able to detect all nuclear tests conducted by the Democratic People's Republic of Korea," citing the system's record of detecting recent tests.