In July 2011, Norway suffered the worst attack by a terrorist acting alone in the history of the world. Yet Anders Breivik was not an Al-Qaeda sympathiser: he was an ethnic Norwegian from the affluent side of Oslo. This World traces the story of the attacks. Combining power-ful eyewitness testimony, unique footage, unseen archive and interviews with those involved -including the Norwegian Prime Minister - the programme makers offer new insights into the life and mind of Breivik, exposing the hidden hatreds that drove him.