U.S. authorities announce a significant advance in nuclear fusion technology | full video

U.S. Energy Secretary Jennifer Granholm and other authorities declared on Tuesday that researchers had successfully generated a "net energy gain," or more energy than was required to initiate a fusion reaction. Simply put, this is one of the most remarkable scientific achievements of the twenty-first century, according to Granholm. The "major scientific achievement" in nuclear fusion research, according to officials, brings the creation of a clean energy source one step closer.