In the six weeks since Iraqi forces began their campaign to retake Mosul, more than 68,000 people have been displaced from the city and its surroundings, the United Nations says.<br /><br /> Roughly half are children, according to the agency.<br /><br /> There are fears the exodus is only just beginning. Aid organisations estimate at least a million people remain in the ISIL-held city, most thought to be gathered west of the Tigris River, where government forces have not yet reached.<br /><br /> The UN is expanding some of its camps around Mosul, amid concerns hundreds of thousands more displaced civilians could need accommodation in the coming months.<br /><br /> But not everyone is fleeing. <br /><br /> Iraqi Christians in the largely Assyrian city of Qaraqosh are now able to return home, south west of Mosul. Some have fled ISIL’s Sunni Muslim militants two and a half years ago.<br /><br /> Their church destroyed, boys can be seen ringing the bell on the ground, as their families take stock of what’s left of their home town.<br />
