Inertia Enterprises has raised $450 million to build one of the world’s most powerful lasers, which it hopes will serve as the foundation of a grid-scale power plant the fusion startup intends to start construction on in 2030. Inertia Enterprises is building on technology developed at the Lawrence Livermore National Laboratory’s National Ignition Facility. The NIF is the site of the world’s only controlled fusion reactions that have reached scientific breakeven, in which the reaction releases mo...