South Sudan's rebel leader Riek Machar addresses a news conference in Ethiopia's capital Addis Ababa, May 12, 2014. South Sudan will postpone a presidential election set for 2015 as the country's ... more 
South Sudan's rebel leader Riek Machar addresses a news conference in Ethiopia's capital Addis Ababa, May 12, 2014. South Sudan will postpone a presidential election set for 2015 as the country's warring factions will need time to reconcile, President Salva Kiir said, with a vote possibly taking place as late as 2018. South Sudan's conflict threatens to tear apart a nation that only became independent from Sudan in 2011 and has curbed its lifeblood oil production. Ethnic divisions have been a significant driver of the violence, which pits Kiir's Dinka people against the Nuer of his former deputy Machar. REUTERS/Tiksa Negeri (ETHIOPIA - Tags: POLITICS ELECTIONS CIVIL UNREST) less 
1 / 28
Reuters | Photo By TIKSA NEGERI / REUTERS
Mon, May 12, 2014 11:20 AM EDT