WASHINGTON, June 4 -- The U.S. Department of Energy's Princeton Plasma Physics Laboratory issued the following news: * * * Wendelstein 7-X sets new performance records in fusion research By Rachel Kremen International efforts included a diagnostic and control system from the Princeton Plasma Physics Laboratory A new fusion record was set thanks to researchers in Germany and the U.S. The international effort moves the world one step closer to a commercial fusion power plant, which will need   more