U.S. slams South Sudan's Kiir over 'man-made' famine, urges truce

By Michelle NicholsUNITED NATIONS (Reuters) - The United States slammed South Sudan's President Salva Kiir on Tuesday for the African state's "man-made" famine and ongoing conflict, urging him to fulfill a month-old pledge of a unilateral truce by ordering his troops back to their barracks."We must see a sign that progress is possible," U.S. Ambassador to the United Nations Nikki Haley told a United Nations Security Council briefing on South Sudan."We must see that ceasefire implemented."South S