Vulcan Rocket Debut Launch Delayed Due to Upper Stage Anomaly Fix.

United Launch Alliance's (ULA) Vulcan Centaur rocket, set to replace Atlas V and Delta IV rockets, requires a key fix prior to its debut launch in May 2023. The rocket will carry Astrobotic's Peregrine lunar lander and Amazon Kuiper internet satellites. The delay was caused by the late delivery of its two BE-4 engines, built by Blue Origin, which were more than four years past the deadline.