a) Welcoming remarks - Ron Gavish, Chief, Training Section, OSI, CTBTO b) OSI Quiz - Ron Gavish, Chief, Training Section, OSI, CTBTO - Misrak Fisseha, Training Officer, Training Section, OSI, CTBTO c) OSI verification elements - Matjaz Prah, Coordinator, Office of the Director, OSI, CTBTO