NASA says the final launch of the space shuttle Discovery has now tentatively been moved to no earlier than February 3rd.

The launch, originally scheduled to blast off on November 5, has been plagued with technical problems delaying the mission.

Discovery's departure has been delayed several times because of bad weather, gas leaks, electrical glitches and cracks found on the shuttle's external fuel tank.

The voyage is expected to be the last for Discovery as NASA prepares to retire the shuttle fleet.

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