After reading yesterday’s post on the brewing fight over funding for nuclear fusion research, Robert L. Hirsch, who directed the country’s fusion energy program in the early days of the Atomic Energy Commission, got in touch to describe how his views of the prospects of harnessing fusion as a practical energy source have evolved. (Just in case you missed it, here’s a link to an interesting comment on the fusion post sent by John P. Holdren, the science adviser to President Obama.)

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