If you live in San Francisco's Bay Area and your name is Darth Vader, head to Lawrence Livermore National Laboratory for the hottest laser action in the galaxy. Instead of destroying planets, however, the US$3-billion National Ignition Facility will be used to fuse hydrogen atoms to create a small star and, in theory, get us closer to an endless power source. A PBS crew got into the facility to film it, and the only thing that comes to mind is "impressive. Very Impressive." The process is fascinating.