An ad hoc committee under the auspices the Committee on International Security and Arms Control (CISAC) will organize a symposium of key thinkers and practitioners from Cooperative Threat Reduction (CTR) programs to exchange ideas on goals for CTR and global security engagement for the next ten years and beyond, based on the vision laid out in the 2009 CISAC report Global Security Engagement: A New Model for Cooperative Threat Reduction. Speakers will address specific questions about past and future CTR programs and activities. A rapporteur will author a brief summary of the symposium.