We are letting children down, says UN chief on World Children's Day

UN Secretary-General Antonio Guterres (Front) addresses a special event to mark World Children's Day at the United Nations headquarters in New York, on Nov. 20, 2017. UN Secretary-General Antonio Guterres on Monday deplored the fact that the world is letting children down by allowing them to go through hardships and suffering. (Xinhua/Li Muzi)