US scientists announce fusion energy breakthrough

WASHINGTON (AP) — Energy Secretary Jennifer Granholm announced a “major scientific breakthrough” Tuesday in the decades-long quest to harness fusion, the energy that powers the sun and stars.Researchers at the Lawrence Livermore National Laboratory in California for the first time produced more energy in a fusion reaction than was used to ignite it, something called net energy gain, the Energy Department said.The achievement will pave the way for advancements in natio