Why do we have Sister Cities or Twin Towns? - BBC What's New

Is where you live a twin town or sister city? Places like Lagos in Nigeria, Brazzaville in Congo and Addis Ababa in Ethiopia are just a few examples. So what are they? And why do we have them? Here’s BBC Reporter Simi Jolaoso to explain. BBC What’s New and BBC Actu Jeunes are the BBC’s first bilingual programmes for teenagers, brought to you by the BBC World Service to discuss important issues for young people across Africa.