General view shows the Al-Mourabitoune Conference Centre in the Mauritanian capital Nouakchott where the 31st Ordinary Session of the Assembly of the Heads of State and Government of the African Union will be held on Sunday. African leaders meet in Mauritania from Sunday, for a two-day summit focusing on free trade, funding, corruption and the continent’s many security crises. The Rwandan leader who holds the presidency of the 55-nation African Union (AU), will make a call to promote free trade.