SHEIKH HAMAD BIN KHALIFA AL THANI, THE EMIR OF QATAR, ARRIVED IN RIYADH THIS EVENING TO ATTEND THE 19TH ARAB SUMMIT, BEGINNING IN RIYADH TOMORROW. AT RIYADH AIRBASE, HE WAS GREETED BY MINISTER OF STATE AND CABINET MEMBER DR. MUSAED AL-EBAN; THE KINGDOM'S CHARGE D'AFFAIRES IN QATAR ALI BIN AHMAD GAZZAZ; GCC SECRETARY GENERAL ABDULRAHMAN BIN HAMAD AL-ATTIYA; AND THE QATARI AMBASSADOR TO THE KINGDOM ALI BIN ABDULLAH AL-MAHMOUD.