Eager to capitalize on opportunities in the dynamic renewable energy field, the manufacturing company Rotek secured incentives, hired additional workers and successfully launched production of the huge metal rings that keep wind turbines spinning. But the boom quickly faded. The Aurora, Ohio, plant struggled to compete with unfairly traded, foreign-made products and ended up eliminating many of the jobs it created just a couple of years before. Ensuring future prosperity will require not only stimulating a manufacturing resurgence but also stabilizing long-term markets for domestically produced goods and raw materials.