Live coverage: NASA evaluating next opportunity for SLS countdown test
NASA started loading liquid oxygen into the Space Launch System’s core stage Monday, but scrubbed a countdown dress rehearsal before pumping propellants into the rocket’s remaining propellant tanks. A previous fueling attempt was scrubbed Sunday due to a ground system issue at the Kennedy Space Center. The cryogenic tanking operation is part of a full-up countdown dress rehearsal ahead of the launch of unpiloted Artemis 1 moon mission.