How will Africa cope with an impending population explosion? Over the next thirty years Africa's population is projected to double, requiring delivery of jobs, housing and infrastructure to enable two billion people to thrive. It is an unprecedented leadership challenge. Does governance in Olusegun Obasanjo's Nigeria inspire confidence or scepticism?(Photo: Olusegun Obasanjo, former president of Nigeria speaks at the London Global African Investment Summit, 2015. Credit: Anthony Devlinl/Getty Images)