Former Portuguese Prime Minister Antonio Guterres will become the next UN secretary-general, following a sixth straw poll of members of the UN Security Council Wednesday. All 15 ambassadors from the security council had agreed on Guterres, who was UN high commissioner for refugees for a decade. Guterres will be confirmed in the post on Thursday after a formal vote. Guterres will replace the incumbent secretary-general, South Korea's Ban Ki-moon, whose second five-year term ends on December 31.