Commonwealth Fusion Systems (CFS) has successfully installed a crucial component of its Sparc demonstration reactor, marking a significant step forward in fusion energy development. The 75-ton cryostat base, essential for the reactor's tokamak, was shipped from Italy to Massachusetts. This installation signifies a transition to building the actual fusion machine. CFS aims to demonstrate that fusion power can generate more energy than it consumes, with expectations for the reactor to come online in 2027. CFS is backed by notable investors, including Bill Gates’s Breakthrough Energy Ventures.