Word: liftoff
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Dates: during 1980-1989
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Seven crew members died when Challenger exploded 73 seconds after liftoff...
Arnold Aldrich, the number-two man in the shuttle program, said he rejected an objection on the morning of the January 28 liftoff by Rockwell International that ice on Pad 39B made conditions "not safe to launch...
...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...