Fergal Keane talks to Dr Jim Swire, who has waged a long campaign to expose those he believes were responsible for the 1988 Lockerbie bombing, in which his daughter died. It has been 21 years since his daughter, Flora, died when Pan Am Flight 103 exploded over Lockerbie, yet Jim Swire's demands for a full public enquiry into the incident remain undimmed. Only then, he believes, might the full story be exposed. Jim has also fought for the release of Abdelbaset Ali al-Megrahi, a man he helped bring to trial but has long believed was innocent.