The Role of the CTBT in the Nuclear Non-proliferation Regime; Moderator: Dr William POTTER, Director, James Martin Center for Non-Proliferation Studies; Ambassador Jayantha DHANAPALA, President, Pugwash Conferences on Science and World Affairs; President of the 1995 NPT Review and Extension Conference; Dr Rebecca JOHNSON, Executive Director, Acronym Institute; Tariq RAUF, Former Head of Verification and Security Policy Coordination, IAEA