CEO John Young oversees Dallas-based Energy Future Holdings whose subsidiaries include TXU, Luminant and Oncor.  This month, Young tells host Lee Cullum that the energy giant will invest trillions in the next 25 years to meet growing energy demands.  In addition to harnessing coal and wind resources, Energy Future Holdings plans to add two nuclear reactors to the Comanche Peak site in Glen Rose.  The Texas economy stands to benefit as Young invests heavily in nuclear and wind transmission.