The collapse of the Islamic State group leaves many countries facing a dilemma over what to do with the fighters’ wives and their children.In Britain, the case of one young woman – Shamima Begum – has sparked fierce debate.But, unnoticed by many, Russia has been bringing women and children out of Iraq and Syria since 2017.It’s a major issue for Moscow as it’s thought some 4,000 extremists left Russia to join IS – most of them from the mainly Muslim North Caucasus.Sarah Rainsford went to the southern Russian republic of Dagestan to meet some of them. Video by BBC