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Submission + - Cost Skyrockets for United States' Share of ITER Fusion Project (

sciencehabit writes: ITER, the international fusion experiment under construction in Cadarache, France, aims to prove that nuclear fusion is a viable power source by creating a "burning plasma" that produces more energy than the machine itself consumes. Although that goal is at least 20 years away, ITER is already burning through money at a prodigious pace. The United States is only a minor partner in the project, which began construction in 2008. But the U.S. contribution to ITER will total $3.9 billion—roughly four times as much as originally estimated—according to a new cost estimate released yesterday. That is about $1.4 billion higher than a 2011 cost estimate, and the numbers are likely to intensify doubts among some members of Congress about continuing the U.S. involvement in the project.

Adding features does not necessarily increase functionality -- it just makes the manuals thicker.