Last week, the Department of Energy said scientists had ignited a fusion reaction that created more energy than was needed to sustain it. 

The Department of Energy is announcing Tuesday that scientists at the Lawrence Livermore National Laboratory have had a major scientific breakthrough.

The Spanish-language network wants more young bilingual viewers

They said it couldn't be done: Nuclear fusion. We visit scientists building a clean power plant that's hotter than the sun — but can they ever deliver? Then: the strange world of cold fusion, the people who hate it and the billionaires betting on it.