Can you imagine a world without rivers? And, after reading this issue, you will say that such a thought is impossible! But, bring your winged shoes as we have much "flying" to do. We'll be cruising the Nile in Egypt, the Yangtze in China, the Ganges in India, the Mississippi in the United States, the Amazon in Brazil, and many many more But, that's not all, we will find just how levees work, why dams are needed (and also the problems they can cause), and what locks do in canals. We'll also visit a few sites where river water is the powering force. You're sure to look at water differently after reading this issue!