(UN Secretary General Ban Ki-moon (R), walks after a meeting with Iraq's top Shi'ite cleric Grand Ayatollah Ali al-Sistani in Najaf July 24, 2014. U.N. Secretary-General Ban Ki-moon sought guidance from Iraq's top cleric on Thursday, as he urged Iraqi politicians to form an inclusive government that can confront a Sunni militant insurgency. Ban's meeting with Shi'ite Grand Ayatollah Ali al-Sistani underscored the 83-year-old cleric's vast sway in Iraq, where Prime Minister Nuri al-Maliki is considered a polarising figure who has fueled sectarian tensions. A spokesman for Ban told Reuters the United Nations chief was meeting with Sistani in the city of Najaf to seek his wisdom on developments in Iraq. REUTERS/Ahmad Mousa )

(UN Secretary General Ban Ki-moon (R), walks after a meeting with Iraq’s top Shi’ite cleric Grand Ayatollah Ali al-Sistani in Najaf July 24, 2014. REUTERS/Ahmad Mousa )