Fears of Bloodbath in Syria's Idlib as Russia, Turkey, Iran Meet

The leaders of Russia, Turkey and Iran are to meet in Tehran Friday to discuss the fate of the Syrian province of Idlib, the last rebel-held area in the country. There are fears that Syrian and Russian forces are about to launch a big offensive, which would likely trigger a humanitarian catastrophe and set up a confrontation with Turkish-backed rebels. Henry Ridgwell looks at whether the Tehran meeting can avert further slaughter in Syria.