NASA says it needs to haul the Artemis II rocket back to the hangar for repairs

The helium system on the SLS upper stage —officially known as the Interim Cryogenic Propulsion Stage (ICPS)—performed well ...
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NASA preparing for Artemis 2 rollback to fix upper stage problem

Just 24 hours after setting a March 6 launch date for the Artemis 2 mission, NASA announced Feb. 21 that a problem with the rocket could delay the launch.