JOHANNESBURG (AP) ? A cease-fire began at midnight Saturday in South Sudan as a weary nation wondered whether this latest attempt to end a five-year civil war would hold. President Salva Kiir and rival Riek Machar agreed on the #8220;permanent#8221; cease-fire on Wednesday in Sudan after their first face-to-face talks in almost two years. They had faced a possible U.N. arms embargo and sanctions if fighting didn#8217;t stop and a political deal wasn#8217;t reached by...