Yesterday afternoon at least two of the African candidates for the top job at the World Trade Organization went in for their interviews before delegates at its headquarters in Geneva in Switzerland. Kenyan government minister Amina Mohamed and former Nigerian finance Ngozi Okonjo Iweala 15 minutes each to put forward their case for the job. Then each was grilled for 75 minutes by delegates about their vision for the future of world trade. John Stremlau, Honorary Professor of International Relations joins CNBC Africa for more.