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The study found that serious safety problems with air travel — such as near collisions and runway interference — occur far more often than was previously recognized. NASA didn't initially release the results to the public, for fear that the findings would alarm passengers and harm airline profits.
Following intense public pressure, NASA administrator Michael Griffin pledged to release the study after it had been scrubbed clean of data that could identify specific pilots.
Congressman Mark Udall (D-CO), chair of the Space and Aeronautics Subcommittee House Committee on Science and Technology, talks about Griffin's testimony.
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