NASA plans to roll the Artemis II Space Launch System rocket and Orion spacecraft off the launch pad at Kennedy Space Center as soon as Tuesday as engineers work to fix a helium flow issue in the rocket’s upper stage. The rollback will move the vehicle about four miles to the Vehicle Assembly Building so crews can determine the cause and complete repairs. NASA says the move could help preserve an April launch window, depending on what engineers find and how quickly fixes can be made. The Artemis II crew has been released from quarantine and remains in Houston as the agency prepares next steps.