Fusion Breakthrough

In this Wednesday, Sept. 18, 2013 file photo, steam rises from cooling towers at the Three Mile Island Nuclear Generating Station in Londenderry Township, Pa., next to the Susquehanna River.

Arthur Turrell, deputy director for research and economics at the U.K.'s Office for National Statistics (ONS) Data Science Campus, a visitor to the plasma physics group at Imperial College London and the author of The Star Builders: Nuclear Fusion and the Race to Power the Planet (Scribner, 2021), talks about the reports of a breakthrough in the pursuit of nuclear fusion which promises a cleaner source of energy.