Mark Urban returns to Bosnia for 'Our World' and discovers how secular Bosnian society has been infiltrated by a militant Islamism which operates to this day.

Over the past ten years, thousands of unaccompanied children have fled to the UK from war-torn Afghanistan, but when they turn 18 they have to return or face deportation. Chris Rogers follows some of the young men, who claim their deportation to Afghanistan would be inhumane and that the UK is now their home.