Why Can't My Child Speak?

Selective mutism is a condition which deprives some children of the ability to speak at will. For the youngsters affected, and their parents, it can cause great anxiety, lead to isolation and hinder a child's progress. For the first time cameras have been allowed access to one of the only intensive therapy summer-camps for young people with selective mutism. Over the course of a week, in New York City, Our World hears from parents, and children, about living with the condition.