INDIAN WELLS, Calif.--Nuclear fusion will move from the lab to reality in a few years, a noted venture capitalist says. "Within five years, large companies will start to think about building fusion reactors," Wal van Lierop, CEO of Chrysalix Energy Venture Capital, said in an interview at the Clean Tech Investor Summit taking place here this week. In three to four years, scientists will demonstrate results that show that fusion has a 60 percent chance of success, he said. If van Lierop were some crazy guy off the street with an old stack of Omni magazines, you could dismiss him....