His Highness The Amir Sheikh Tamim bin Hamad Al Thani attended the dinner banquet held Tuesday by his brother HRH Crown Prince, Deputy Prime Minister and Minister of Defense of the sisterly Kingdom of Saudi Arabia Prince Mohammed bin Salman bin Abdulaziz Al Saud, in honor of Their Majesties and Highnesses leaders of GCC countries and heads of delegations participating in the 42nd session of the Supreme Council of the Cooperation Council for the Arab States of the Gulf (GCC), at Diriyah Palace in Riyadh.