Lagos: Africa's beast of a megacity

With between 15 million and 21 million people - the upper estimate is the official one, though no one really knows - and generating a third of GDP for Africa's second biggest economy, Lagos has become almost as alluring to yield-hungry investors as it is to the 4,000 or so economic migrants who turn up each day. (Reuters)

For more, read Insight: The struggle to tame Africa's beast of a megacity