Why was there another coup in Mali?

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Three coups in less than a decade: to say Malian politics have been rocky is an understatement. On Monday, a government reshuffle turned sour led to the arrest of the president and prime-minister. The army is once again in charge. The media talk of yet another coup – so, how did we get here? Host: Karnie Sharp (@KarnieSharp on Twitter) Guest: Beverly Ochieng, BBC Monitoring. #AfricaDaily