Spending a night on Mosul's frontline
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Inside Mosul: Iraq’s 'humanitarian catastrophe’

The United Nations says that the ongoing battle for Iraq’s second city of Mosul could result in the worst humanitarian catastrophe in the war against so-called Islamic State.

The battle began six months ago, and hundreds of thousands of civilians remain trapped inside parts of the city still in IS hands.

The militants are now surrounded, but the progress of the Iraqi Forces has slowed significantly in recent weeks.

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