Why has Burundi closed its border with Rwanda?

Burundi has closed its borders with Rwanda after accusing its neighbour of funding rebel attacks. Rwandan President Paul Kagame denies the charge, but Burundi's government has branded him a "bad neighbour". Can the two neigbours overcome their differences?Also a report on migrant workers facing forced labour and exploitation in MauritiusAnd a doctor from Sierra Leone tells us how his country and developing countries can hold onto their health care workers.