Battle for Mosul: The dilemma facing forces up against IS

The battle to retake Mosul from so-called Islamic State is entering its final stages.

But US forces say that government soldiers taking on IS face a dilemma.

Push too hard? Civilians die. Wait too long? Civilians still die.

The American team in Mosul gave special access to the BBC's Feras Kilani, Khalid Alayash and Joan Soley.