Nature News: Construction at the site of ITER—the multibillion-euro project to prove controlled nuclear fusion—has been at a standstill since April.The stoppage comes as European contributors negotiate how to pay for their share of ITER, a collaboration between Europe, Japan, South Korea, Russia, the United States, China and India.Excavations for the buildings, slated to begin this autumn, will not start until spring 2010—roughly a year after site preparations were completed.