Scientists have tracked the ancestor of HIV to something like a zip code, a remote corner of the West African rain forest.

NPR: Origin of AIDS Linked to Colonial Practices in Africa

In the south west of Rwanda the French troops set up a secure zone, code-named Turquoise.

BBC: Part Three - France and the World

Such advance-fee frauds are also known as "419 scams" - named after the section of the West African country's criminal code that prohibits fraud.

BBC: NEWS | Africa | Bank scam trial opens in Nigeria