Africa Union Commission chairperson Jean Ping and Nigeria's President Goodluck Jonathan arrive at the African Union Summit in Ethiopia's capital Addis Ababa, January 28, 2011. African leaders must insist Ivory Coast's rivals for the presidency hold face-to-face talks to resolve the post-election crisis, the African Union mediator said on Friday. Picture taken January 28, 2011. REUTERS/Thomas Mukoya (ETHIOPIA - Tags: SOCIETY POLITICS)