Nigeria gears up for Saturday's presidential polls
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The main opposition candidate in upcoming presidential elections in Nigeria, Atiku Abubakar, holds a rally in which he slams President Muhammadu Buhari's security record. Also, power cuts in South Africa spark fury as the state-owned utility firm Eskom struggles with a shortage of generating capacity for a third straight day. And a month after fatal riots in Zimbabwe, the country's opposition still refuses to talk to the government.