12 December 2014 Last updated at 10:56 ET

Islamic State fighters, file picMaking money

Interactive video: How Islamic State is funded

Graphic'Terrifying night'

Resident of IS-run Mosul caught outside during air strike

Features and Analysis

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.