Battlegrounds

As athletes turn up to the winter Olympic games, what might they find? The Thai fishing industry is accused of using slave labour; Syrians can only look across the border from Turkey at their old homes and hope to return one day; an Italian priest takes on militia groups in the Central African Republic to save Muslims and Christians alike; and we hear of one of Britain's worst military defeats which is still a source of great pride for Zulus.
Kate Adie introduces these reports from around the world.