Why has Burundi closed its border with Rwanda?

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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 Mauritius And a doctor from Sierra Leone tells us how his country and developing countries can hold onto their health care workers.