Afterfourdecadesofreportingfromthecontinent,JonathanDimblebyreturnstoAfricaona7,000-milejourneytodiscoverhowitischanging.【Mali,GhanaandNigeria】HestartshisAfricanjourneyinthecapitalofMali,Bamako,thefastest-growingAfricancity.FollowingthecourseoftheNigerriver,Dimblebyfindsnotacontinentofbeggarsbutofindustriouspeople,some...