Then, Secretary General of the United Nations Ban Ki-moon delivered a speech in which he expressed his thanks to the Custodian of the Two Holy Mosques for hosting the Summit stressing the strength of relations between the Arab and South American countries. The UN official discussed a number of issues including terrorism, Syria and Yemen, hailing Saudi humanitarian efforts in Yemen. Then, Custodian of the Two Holy Mosques King Salman bin Abdulaziz Al Saud, the Chairman of the Fourth Summit of Arab and South American countries, announced the start of the first closed-door working session. --More 23:55 LOCAL TIME 20:55 GMT www.spa.gov.sa/w