Prince Naif bin Abdulaziz, Second Deputy Premier and Minister of Interior patronized here on Sunday evening the graduation ceremony of qualification courses for cadets of Public Security Training City. Upon arrival at the venue, he was received by Prince Mohammed bin Naif bin Abdulaziz, Assistant Minister of Interior for Security Affairs and a number of officials. In a press statement, Prince Naif said that the graduates will move from the sites of training and studies to locations of actual works and we will see their actions on the ground to serve the security of this homeland in accordance with the directives of the leadership of the Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz and Crown Prince Sultan bin Abdulaziz, Deputy Premier, Minister of Defense and Aviation and Inspector General. Prince Naif added that all citizens are in the service of the homeland's security, and "I repeat that a citizen is the first security man." The ceremony was attended by Prince Abdulaziz bin Saud bin Naif bin Abdulaziz; Prince Mohammed bin Saud bin Naif bin Abdulaziz; Undersecretary of Ministry of Interior Dr. Ahmed Al-Salem; and a number of ministers and officials. Earlier on Sunday, Prince Mohammed bin Naif bin Abdulaziz, Assistant Minister of Interior for Security Affairs opened the 4th Security Exhibition at Public Security Training City with the participation of national companies and establishments specializing in security technology and modern equipment.