OXYGEN011:
But unfortunately I don't know any prominent person from nigeria. I mean a person who is known worldwide.

Because you're not current and you're a local boy,you were not brought up with satellite and TVs around you,so you cant know them,ive known Kofi Ann since 1998 when i was a very lil kid,same year i knew Bin Laden,and my mom used to tell me about great people like that around the world and even Africa,i could remember she told me about Musa of Mali then,but your mom is probably an uneducated fish vendor that doesnt even know Kofi Annan and great people from Ghana,not to talk of Nigeria