Energy: The government says wind power could supply the eastern half of the U.S. with a fifth of its electricity by 2024. Just don't try building wind farms where someone might see them. A claim is contained in a new study released by the Energy Department's National Renewable Energy Laboratory, and technically it might be true. But we've heard these overblown predictions before, and experience around the world with heavily subsidized alternative energy has not worked out well. The area in question, called the Eastern Interconnection, is a grid extending roughly from the western borders of the Plains states through...