Microsoft founder Bill Gates says that most of his fortune will be spent on improving health and education services in Africa over the next 20 years. Bill Gates said that "by unleashing human potential through health and education, every country in Africa should be on a path to prosperity". Gates announced last month that he would give away 99% of his vast fortune - which he expects to reach $200bn (£150bn) - by 2045, by when his foundation planned to end its operations. Bill Gates joins BBC’s