Istanbul Syria Summit
Syria summit: Assad's fate must be decided by Syrian people
Key points from Syria summit in Istanbul
Four-way summit on Syria ends in Istanbul
A brief history of peace attempts and failures in Syria
Turkey's four-way summit on Syrian war
Turkey to focus on 'political solution' in four-way Syria summit
Istanbul Syria Summit: Displaced families struggle to resettle
Syrians see light at the end of the tunnel as war simmers down
The Syrian war: Everything you need to know