Watch live: Relativity Space to launch first 3D-printed, methane-fueled orbital rocket

Relativity Space, a California-based startup that counts billionaire Mark Cuban as one of its early investors, will try to launch the first 3D-printed, methane-fueled rocket into orbit from Cape Canaveral Wednesday. The Terran 1 rocket’s first test flight has a three-hour launch window opening at 1 p.m. EST (1800 GMT).