Kofi Annan, Joint Special Envoy of the United Nations and the Arab League for Syria, leaves after a press briefing, at the European headquarters of the United Nations, UN, in Geneva, Switzerland, Thursday Aug. 2, 2012. Annan is stepping down as UN Arab League mediator in the 17-month-old Syria conflict at the end of the month, U.N. chief Ban Ki-moon said in a statement on Thursday. (AP Photo/Keystone, Martial Trezzini)
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