The head of the rebel delegation says it aims to end the "crimes" of the government and its allies.Read more
Syrian civil war
The BBC's Middle East editor Jeremy Bowen shares his images - and thoughts - from a journey through ruins of Syria's Aleppo.
US journalist Theo Padnos was held captive in Syria by Jabhat al-Nusra from 2012 to 2014.
American special forces have tracked down a jihadist leader near the city of Deir Ezzor which is about 140 kilometres from Islamic States's headquarters in the city of Raqqa. We heard from a Pentagon spokesman, Navy Captain Jeff Davis. (Photo: Rubble from destroyed buildings making up the souk or market in the old sector of the eastern city of Deir Ezzor in 2014. Credit: AFP)