President Muhammadu Buhari yesterday expressed optimism that improvement in relations between Nigeria and South Africa would speed up the process of development on the African continent. Speaking in concurrence with the Chairman of the African National Congress (ANC) and South Africa’s Minister of Mineral Resources and Energy, Gwede Mantashe, who came to the State House, Abuja on Friday as Special Envoy of his country, President Buhari cited his last trip to South Africa during which he and President Cyril Ramaphosa worked together in resolving the migrants’ crisis between two brotherly nations. The President in a statement issued by his Senior Special Assistant on Media and Publicity, Mallam Garba Shehu said, “There was this ‘small problem’ between our countries. I went there and we resol...