Related Clues:

• Scrubbed
• Scrubbed mission
• Out of order
• NASA scratch
• Unable to proceed
• NASA scrub
• Thumbs-down
• NASA failure
• Futile
• 'Absolutely not!'
• Off-limits
• Scrapped, at NASA
• 'How could you even ask such a thing?!'
• 'Unh-unh'
• Denial