Nuclear fusion "breakthrough" reportedly arrives

Driving the news: The breakthrough came in the past two weeks at the National Ignition Facility of the federal Lawrence Livermore National Laboratory in California, the Financial Times reported in a scoop.

• Granholm will announce scientists for the first time have produced "a fusion reaction that creates a net energy gain — a major milestone in the decades-long, multibillion-dollar quest to develop a technology that provides unlimited, cheap, clean power," the Washington Post adds.

Reality check: Progress in showing conceptual viability would be just one stop on the long scientific, technical and financial road to commercializing this long-elusive holy grail.

What's next: Granholm's announcement tomorrow is billed as a "major scientific breakthrough."

Go deeper: Axios' Alison Snyder explored fusion energy earlier this year