Since the start of Boko Haram's insurgency thousands of boys and girls have gone missing across north eastern Nigeria. The Islamist group use the kidnap of children as a strategy in their asymmetric war. Girls, as young as eight, are taken to be married off to fighters or deployed as sex slaves and, increasingly, used to commit suicide attacks.
Susan (14): 'We are very close. We went through the same experience and that creates a bond. I am convinced that we will be friends for life. We understand each other without having to explain anything. We sometimes talk about our ordeal and we talk about the people who are still missing or murdered. That is our way of keeping the memory alive.'