Word: liftoff
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...Post also said that, "at the urging of the National Aeronautics and Space Administration," officials of booster manufacturer Morton Thiokol agreed to the cold-weather launch on the eve of liftoff after twice recommending against...
WASHINGTON -- Top NASA officials who gave the go-ahead to launch the ill-fated Challenger mission were never told of a low temperature reading of 7 to 9 degrees on the shuttle's right booster rocket prior to liftoff, according to the space agency...
Only four sensors remained on the boosters used for Challenger, and officials said there was no data monitored during liftoff at Mission Control to indicate a problem...
Yesterday's launch, scheduled for 9:38 a.m. EST, had been delayed two hours while officials analyzed the possibility that foot-long launch-pad icicles that formed in the frosty Florida morning might cause problems. But after liftoff, at 11:38 a.m., the NASA commentator, Steve Nesbitt, reported systems were normal...
...There were no signs of abnormalities on the screens" as flight controllers monitored Challenger's liftoff and ascent, a source said. The source,at the Johnson Space Center in Houston, said theblast occurred "unexpectedly and with absolutelyno warning...