A rare desert thunderstorm sweeps through Monument Valley, Arizona, bringing much needed rain. Around the globe 1,800 thunderstorms raging at any given moment. But here, in Monument Valley, located on a 16 million acre Navajo Indian Reservation, precipitation is limited. These harsh, arid conditions have always challenged local inhabitants. Today, modern Pueblo Indians use various methods to draw out the most moisture possible for their crops. Surprisingly, sand dunes retain enough water to sustain crops. Rainwater runoff is also diverted toward their scattered plots. In drier years the Navajo depend on water that seeps from an aquifer. Large game, such as deer, bison, antelope and big horn sheep have not existed here for hundreds of years. The amazing Navajo have survived for centuries, relying on sheep, other livestock and small plots of crops.