African Union President Jean Ping of Gabon attends an extraordinary meeting of the Economic Community of West African States (Ecowas) in Dakar, April 2, 2012. Senegal's Macky Sall took his oath as president of the West African country on Monday under the gaze of regional leaders due to hold emergency talks later on the crisis in neighbouring Mali. REUTERS/Joe Penney (SENEGAL - Tags: POLITICS ELECTIONS)