National Public Radio: Sure, Iowa’s known for corn. But for decades it was a major source of house hold appliances. Industry giants like Amana, Maytag and others supplied much of Americans’ demand. Most of the factories are closed now, and the losses hit hard in places like the Amana Colonies, communal villages where ancient German customs are carefully preserved. But Iowa has since taken the lead in the emerging field of wind energy. Some of the same workers who use to make appliances are now busy building …