Why has Mali cut diplomatic ties with Ukraine?

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Mali and now Niger say they've cut diplomatic relations with Ukraine. How much involvement does Kyiv have in the Sahel?   Why are multinational companies leaving Nigeria?   And we hear more about the world's greatest running rivalry: Kenya vs Ethiopia   Presenter: Audrey Brown Producers : Victor Sylver, Charles Gitonga, Sunita Nahar and Nyasha Michelle Technical Producer: Chris Ablakwa Senior Producer: Paul Bakibinga Editors: Andre Lombard and Alice Muthengi