Associated Press: The latest domestic energy boom is sweeping through some of the nation's driest pockets, drawing millions of gallons of water to unlock oil and gas reserves from beneath the Earth's surface. Hydraulic fracturing, or the drilling technique commonly known as fracking, has been used for decades to blast huge volumes of water, fine sand and chemicals into the ground to crack open valuable shale formations. But now, as energy companies vie to exploit vast reserves west of the Mississippi, fracking's...