His Highness the Amir Sheikh Tamim bin Hamad al-Thani participated with GCC leaders and heads of delegations in the 43rd session of the Supreme Council Summit in Riyadh. The session was attended by a number of members of the official delegation accompanying the Amir, and a number of princes and members of the official accompanying delegations. It was also attended by GCC Secretary-General Dr Nayef bin Falah al-Hajraf.