Prince Naif bin Abdulaziz, the Minister of Interior patronized here today a graduation ceremony of a number of qualifying courses for cadets at Training City of Public Security in Riyadh and opened the Second Security Exhibition of Public Security . Upon arrival at the venue, Prince Naif accompanied by Prince Abdulaziz bin Saud bin Naif bin Abdulaziz was received by Prince Mohammed bin Naif bin Abdulaziz, Assistant Interior Minister for Security Affairs; Lieutenant General Saeed bin Abdullah Al-Qahtani, Director of Public Security; and a number of officials. Prince Naif handed over prizes and certificates to the graduates. later, Prince Naif opened the Second Security Exhibition of Public Security and watched its contents. The graduation and opening ceremony was attended by a number of ministers and officials.