HH the Emir Sheikh Tamim bin Hamad al-Thani leaves for Saudi Arabia today to head Qatar’s delegation in the 36th summit of the GCC Supreme Council, which will be held in Riyadh. Yesterday, the Emir received a written message from the Custodian of the Two Holy Mosques, King Salman bin Abdulaziz al-Saud, inviting him to attend the  GCC summit which will be held today and tomorrow.