NASA's most potent rocket launch has been postponed owing to a tropical storm that could intensify into a hurricane.
On Tuesday, the Artemis I Moon rocket was scheduled to lift off from Florida's Kennedy Space Center.
However, tropical storm Ian, which might become a major hurricane early next week and threaten the US state, has intensified.
The rocket launch had already been delayed twice. according to Jim Free, associate administrator for the agency's exploration systems development office.
After a 50-year hiatus, the Space Launch System (SLS) craft will return humans and their supplies to the Moon.
Technical difficulties caused its initial launch to fail at the end of August, and a fuel leak complicated a second attempt at the beginning of September.
A "step-wise approach" to the decision to roll back retained a launch chance if circumstances improved,