The opening ceremony John Simpson, BBC World Affairs Editor, hosts the opening ceremony The opening ceremony The opening ceremony Rex Tillerson speaks at the Opening Ceremony His Excellency Dr Sultan Ahmed Al Jaber speaks at the opening ceremony Rex Tillerson and His Excellency Mohammad Sanusi Barkindo The opening ceremony The opening ceremony Dr Daniel Yergen and His Excellency Suhail Mohammed Faraj Al Mazroui John Simpson, BBC World Affairs Editor, interviews Dr Daniel Yergen John Simpson, BBC World Affairs Editor, interviews Dr Daniel Yergen John Simpson, BBC World Affairs Editor, interviews Dr Daniel Yergen
