The leaders of Arab countries started arriving here today to participate in the works of the 3rd Arab Economic and Social Development Summit to be held in Riyadh on Monday and Tuesday. Lebanese Prime Minister Najib Mikati arrived here today. At Riyadh Air Base Airport, he was received by Prince Mohammed bin Saad bin Abdulaziz, Vice Governor of Riyadh Region, Saudi Ambassador to Lebanon Ali bin Awadh Asiri, and the Chargé D'affaires at the Lebanese Embassy to the Kingdom of Saudi Arabia Salam Ashqar, and a number of officials. --More