WASHINGTON, Jan. 3 -- The U.S. Department of Energy's Princeton Plasma Physics Laboratory issued the following news: Steve Armstrong served in the U.S. Army for three-and-a-half years as an electrician. When he was discharged, he trained to work in heating, ventilation and air conditioning. That's when he learned about the Princeton Plasma Physics Laboratory's four-year apprentice program in which apprentices receive on-the-job training and classes in cutting-edge technical fields. "I would sa  more