Another day, another scrub for the world’s first 3D-printed rocket. On Saturday, Relativity Space’s Terran 1 rocket failed to get off the ground after two launch attempts. It was a day of false starts. Following Wednesday's scrub, Relativity Space initially set its sights on a 1:45PM ET launch, a window the company later pushed back to 2:45PM ET due to "upper-level wind violations."