Global Security: Comprehensive Test Ban A cross-lab team sponsored by Institutional Development Center 12100 completed a set of in-depth technical studies to assess the implications of a renewed call for ratification of the Comprehensive Test Ban Treaty. The results of these studies provide a basis for laboratory leaders to assert the need for US global leadership in matters of a nuclear nature, options to continue to provide a credible nuclear deterrent for the indefinite future, and comprehensive monitoring and verification solutions.