Cooperation and congratulations are the buzzwords of the day as Nigeria's recently elected leader Muhammadu Buhari meets with US President Barack Obama. Also, 25 years after the end of his regime, former Chadian dictator Hissene Habre appears in a Senegalese court accused of crimes against humanity. And on the eve of problematic presidential polls in Burundi, tensions continue to run high in the capital Bujumbura.

Produced by Georja Calvin-Smith and Phoebe Lanzer Wood

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