On September 21st 2017, Issues and perspectives seminar, sponsored by Toyota Motor Korea, was held in GSIS. Professor Dukmin Yun, a former chancellor of Korea National Diplomatic Academy(KNDA), gave a presentation about “The enhancement of DPRK’s nuclear missile capabilities and the change in East Asia’s security environment”, one of the issues which is receiving great international attention these days. Professor Yun suggested three steps of actions to counteract DPRK’s nuclear capabilities and current crisis – Deterrence, Transformation and Denuclearization.