Artemis II Rollback to VAB Delays Moon Mission
NASA will roll the Artemis II Space Launch System rocket from Launch Complex 39B back to the Vehicle Assembly Building for repairs after an interruption in helium flow to the upper stage, a fix that must be performed in the VAB; the rollback ends the March launch window and aims to preserve an April opportunity if data and repairs permit, with the cause under investigation and potential fixes including a valve, umbilical interface, or filter; the crew have completed quarantine and training continues.