Atlantis Set To Fly At 4:31 P.M. ET Dec. 6; Little Debate On Go-Fly Decision 

Helium Valve Problem Still In Review; Space Station Crew Spacewalk Set Tomorrow Space Shuttle Atlantis is set to launch at 4:31 p.m. ET Dec. 6 from launch pad 39A at Kennedy Space Center, barring major snags that might force a liftoff postpone of a few days, or into January, NASA leaders told the news media...

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