Helium-flow anomaly prompts NASA to roll Artemis II SLS–Orion back to VAB, jeopardizing March launch window
NASA detected an interrupted helium flow to the SLS upper stage and is preparing to roll the SLS–Orion stack off the pad and back to the Vehicle Assembly Building for inspection and repairs. Agency officials say the move "will almost assuredly impact the March launch window" for Artemis II.