On behalf of Crown Prince Abdullah bin Abdulaziz, the Deputy Premier and Commander of the National Guard, Prince Naif bin Abdulaziz, the Interior Minister, participated in Sudan's celebrations on the occasion of signing the transitional constitution, the inauguration of two vice presidents Dr. John Garang as Ist Vice President and Ali Othman Mohammed Taha, as 2nd Vice President and swearing-in ceremony patronized by Sudan's President Omar Hassan Al-Basheer at the Presidential Palace here today. The ceremony was attended by Saudi Ambassador to Sudan Abdullah bin Mohammed Al-Harithi and Advisor at the Saudi Embassy Saad bin Dhafer Al-Qarni. The Sudanese President saw off Prince Naif at the Presidential Palace, wishing him a happy journey. Later today, Prince Naif left Khartoum. At Khartoum International Airport, he was seen off by a number of officials.