THE LEADERS OF THE ARAB GULF COOPERATION COUNCIL (GCC) BEGAN TO ARRIVE HERE TODAY TO PARTICIPATE IN THE 27TH SESSION OF THE GCC SUPREME COUNCIL, NAMED AS "SHEIKH JABER SUMMIT", DUE TO BE INAUGURATED HERE LATER TODAY. THOSE WHO ARRIVED EARLIER TODAY INCLUDED SHEIKH KHALIFA BIN ZAYED AL-NAHYAN, THE PRESIDENT OF THE UAE, AND KING HAMAD BIN EISA AL-KHALIFA OF BAHRAIN. ON THEIR ARRIVAL, THEY WERE WELCOMED AT THE AIRPORT OF RIYADH AIRBASE BY THE CUSTODIAN OF THE TWO HOLY MOSQUES KING ABDULLAH BIN ABDULAZIZ; CROWN PRINCE SULTAN BIN ABDULAZIZ, THE DEPUTY PREMIER, DEFENSE AND AVIATION MINISTER AND INSPECTOR GENERAL, OTHER PRINCES AND SENIOR OFFICIALS. SHEIKH KHALIFA AND KING HAMAD ARE ACCOMPANIED BY HIGH-RANKING DELEGATIONS.