The leaders and heads of delegations of Gulf Cooperation Council (GCC) started here today their 2nd closed-door session within the framework of the 33rd Summit of the Supreme Council. On behalf of the Custodian of the Two Holy Mosques, King Abdullah bin Abdulaziz Al Saud, Crown Prince Salman bin Abdulaziz Al Saud, Deputy Premier and Minister of Defense heads the delegation of the Kingdom of Saudi Arabia to the Summit. The Summit will conclude its deliberations later today.