In Khartoum on Wednesday, negotiations aimed at putting a ceasefire in place fell apart. Sudan’s national army and a rival paramilitary group have tried and failed to implement ceasefires more than once since fighting broke out in the Sudanese capital more than six weeks ago. Now, the United Nations says more than a million people have been displaced by the conflict. The World’s Africa correspondent Halima Gikandi has been speaking with people fleeing the violence.