SANAA, MARCH 28, SPA -- YEMENI PRESIDENT ALI ABDULLAH SALIH HAS LEFT FOR SUDAN AT THE HEAD OF THE YEMENI DELEGATION DUE TO PARTICIPATE IN THE 18TH ARAB SUMMIT. THE SUMMIT WILL BE OPENED IN KHARTOUM TODAY. --SPA 10 27 LOCAL TIME 07 27 GMT www.spa.gov.sa/349026