Battle for Mosul: Iraq's fight against Islamic State group (part 2)

It’s finally here: the long-awaited, long-announced offensive to retake Mosul, northern Iraq's largest city, from the Islamic State group. We'll get the latest on a battle that's now playing out in a city still home to up to 1.5 million citizens. How to prevent the Aleppo-style carpet bombing of civilians? We'll also look at what could be a scramble for the river-lined capital of an oil-rich area. Who will control Mosul when the dust settles?