The so-called Islamic State has shown itself capable of striking civilian targets in western Europe. But is the terror group on the back foot in its heartlands of Iraq and Syria?
We have arrived at a crossroads. Few can have believed that the bloody killings of Charlie Hebdo's staff would be the end of it.
Kurdish fighters say they have seized a key Iraqi town from Islamic State after a military offensive supported by US-led coalition aircraft.
Migrants and refugees travelling to Europe to apply for asylum in 2015 have collectively travelled two billion miles, Channel 4 News can reveal.
An exclusive film reveals how Isis in Syria and Iraq systematically recruits children as young as eight to become soldiers and suicide bombers, and exacts brutal punishment on those who defy them.