In this photo provided by the United Nations, United Nations Secretary General Ban Ki-moon, left, joins Lakhdar Brahimi as Brahimi announces his resignation as Joint Special Representative of the United Nations and the League of Arab States for Syria, Tuesday, May 13, 2014 at United Nations headquarters. After nearly two years in the position, Brahimi’s resignation becomes effective on May 31. (AP Photo/The United Nations, JC McIlwaine)
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