My answer to Space Shuttle Columbia Accident on Ask MetaFilter
The official accident report is surprisingly readable—I had to look at it a while back for a university project.
This is Space Shuttle Columbia Accident by Simon Willison, posted on 20th June 2005.
Tagged askmetafilter, NASA, accident, Columbia, Shuttle, Space
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Previously hosted at http://simon.incutio.com/archive/2005/06/20/space-shuttle-columbia-accident