With multi-ton components shipped from China and other parts of the world, workers at a dusty construction site in southern France are rushing to assemble the world's largest and most expensive nuclear fusion experiment.
The project, called the International Thermonuclear Experimental Reactor (ITER), is being built to test whether the long-sought dream of nuclear fusion -- the atomic reaction that powers the sun -- can be harnessed to generate near-limitless clean energy.
