Islamic State (IS) shocked the world when they took control of Mosul, Iraq's second city, in June of this year.

The Islamic State in Iraq and Syria has a detailed structure that encompasses many functions and jurisdictions, according to ISIS documents seized by Iraqi forces and seen by American officials and Hashim Alhashimi, an Iraqi researcher.

Islamic State (IS) is a radical Islamist group that has seized large swathes of territory in eastern Syria and across northern and western Iraq.