Mosul, Iraq, is a city where more than one million people once lived, but it was reduced to rubble after three years of ISIS occupation and a brutal nine-month battle to take it back. Some estimates put the number of civilians casualties at 40,000, some killed by airstrikes carried out by the American-led coalition that helped the Iraqi army regain control of Mosul last month. More than 700,000 people were displaced during the conflict, most dispersed to 20 refugee camps run by the Iraqi and Kurdish governments outside the decimated city. NewsHour Weekend Special Correspondent Marcia Biggs and videographer Alessandro Pavone went to Mosul and the refugee camps on its outskirts to find out what survivors of the siege have endured.