Mosul Why battle for Iraq”s second city is so important

Why the battle for Mosul matters so much
Media playback is unsupported on your device

Mosul: Why battle for Iraq"s second city is so important

17 October 2016 Last updated at 20:29 BST

Caroline Hawley explains why the battle to retake Iraq"s second city, Mosul, from so-called Islamic State, is so important.

Read the full article...