Mosul

The police force has regrouped outside the city and is eager to return and reclaim Mosul from the Islamic State. But some officers speak openly of their desire to settle scores.

This is a key moment in the war against ISIS. Mosul — one of Iraq's largest cities — is the last major urban center in the country under ISIS control. It's expected to be a long and difficult fight.

Iraq is readying for an assault on ISIS in the city of Mosul. Former residents say the extremists are tackling resistance with extra brutality. This report includes graphic descriptions of violence.

The U.S.-backed Iraqi offensive to try to force ISIS from Mosul may be just days away. Hundreds of thousands could be displaced in the fighting but the nearest camp can accommodate only 50,000 people.