Former Portuguese prime minister Antonio Guterres has been sworn in as Secretary-General of the United Nations during a formal ceremony today in New York.
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The former UN refugee chief was elected by acclamation in the General Assembly in October and takes over from Ban Ki-moon on January 1.
Guterres pledged to “exercise in all loyalty, discretion and conscience” his duties as UN chief. He also vowed to carry out reforms to improve the world body.