• NASA said it would roll its giant moon rocket off its launchpad in Florida and back to the assembly building to protect the vehicle from an advancing Hurricane Ian.
• The Space Launch System’s rollback to the Vehicle Assembly Building is a slow and delicate process that takes between eight and 11 hours to complete the roughly 5-mile trip.
• Hurricane Ian is just the latest delay for the rocket, after weeks of troubleshooting by NASA after engineers detected a leak of supercooled hydrogen propellant in a valve.

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