Emerging markets are having a tough time the world over, but who is to blame? Is it the rich world's monetary policies or have more deep-seated problems merely been masked for years by stellar economic growth? Plus: Will the wars of the future be fought over water? Will these types of conflicts become more widespread and serious? It is World Water Week, so Counting the Cost decided to take a closer look at a potential source of conflict. Also on Counting the Cost: Africa's aviation hub: could Nigeria fulfil this role for Africa? Analysts say previous governments have not been committed to improving the aviation sector, but that this administration is investing heavily in infrastructure and training to get its ambitious ideas off the ground. So, will the Nigerian government achieve its goal? And if it does, how could this impact the Nigerian economy?