Space Shuttle Discovery Launch Delayed Till November 30

Discovery's final flight is now slated for the end of the month, as engineers investigate a "significant" gas leak and cracks in the external fuel tank.

After discussing the issue, NASA announced today that the shuttle will fly no earlier than November 30 at 4:05 a.m. ET, the start of the last launch window for the year. (Find out how to vote for the wake-up songs to be played during Discovery's final flight.)

If Discovery doesn't fly at the end of November, "the next window of opportunity is February, which is when STS-134 is scheduled to happen," said NASA spokesperson Joshua Buck.

The shuttle Endeavour is currently due to conduct STS-134, the final planned shuttle mission before the fleet is retired. If Discovery's launch rolls to February, Endeavour's flight would be pushed back, possibly

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