In this photo released by the Syrian official news agency SANA, United Nations special envoy to Syria Staffan de Mistura, left, speaks with Syrian Foreign Minister Walid al-Moallem in Damascus, Syria, Tuesday, Nov. 11, 2014. The United Nations envoy to Syria is calling for a truce in the northern city of Aleppo as a building block to a wider resolution of the countrys grinding civil war. (AP Photo/SANA)