Hassan Abu Haniyeh

Analysis: The Islamic State group has morphed from a insurgent group in Iraq to a totalitarian entity that calls itself a 'caliphate'. Hassan Abu Haniyeh examines its development.

Analysis: The Islamic State group's strength lies within a structured administration and strict lines of command. Hassan Abu Haniyeh examines how it is able to hold territory in Iraq and Syria after it is overrun.

Despite losing swathes of territory to the Islamic State group in eastern Syria, the al-Qaeda affiliate is still a force to be reckoned with.