Bystanders - Darfur and the Promise Broken. After rebels attacked government forces in the Darfur region of western Sudan, the brutal crackdown that followed led to hundreds of thousands of deaths and millions driven from their homes. Fergal Keane reports on why the world has failed to forge a response to the tragedy. Conflicts chronicles the origins of the crisis on Thursday on BBC3 at 9.30pm. Producer Darren Kemp ; Editor Mike Robinson Signed repeat on Thursday at 1.55am www.bbc.co.uk/panorama NOTE: as Panorama reacts to news, its subject matter may change Elephant Diaries continues the season tomorrow at 7pm Africa round-up: page 28