By Dave Ahearn Putting astronaut crew safety first, NASA has mandated a weeks-long troubleshooting delay for a scheduled space shuttle flight. A maddening intermittent malfunction in an external fuel tank sensor system finally forced NASA to abandon plans for its fourth space shuttle launch this year, pushing the liftoff of Space Shuttle Atlantis into next month, NASA leaders said yesterday. That ended days of battling the frustrating intermittent problem, which can't be replicated on demand so that it might be…
Space Shuttle
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