On air: Trading places

                        
If you live outside Africa, and you give money to causes there, can you ever imagine a day when you won’t do it? Whether the answer is yes or no, you’d also probably say, “but I’d like to”.

Well, Africans would like to get to that point too, but so far, no-one seems to have cracked just how to get the continent off the aid drip. But Rwanda has some ideas.