Barrier built around Sudan’s el-Fasher city

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An extensive earthen wall is being built around the besieged Sudanese city of el-Fasher. Researchers from Yale University say it is intended to trap people inside. Why is there a rapidly growing demand for solar panels in Africa? And we meet Iris- the teaching robot in South Africa. Presenter: Audrey Brown Producers: Charles Gitonga in Nairobi, Mark Wilberforce, Yvette Twagiramariya and Sunita Nahar in London. Senior Producer: Paul Bakibinga Technical Producer: Jonathan Greer Editors: Maryam Abdalla, Andre Lombard and Alice Muthengi