United Nations Secretary-General Antonio Guterres (C, rear), Helen Clark (L, rear), administrator of the United Nations Development Programme, and Stephen O'Brien (R, rear), UN under-secretary-general for humanitarian affairs and emergency relief coordinator, attend a press conference on humanitarian crisis in South Sudan, Somalia, Yemen and north-east Nigeria, at the UN headquarters in New York, on Feb. 22, 2017. Over 20 million people in South Sudan, Somalia, Yemen and north-east Nigeria are facing "devastating" levels of food insecurity, UN Secretary-General Antonio Guterres told reporters here on Wednesday. (Xinhua/Li Muzi)
