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Shuttle disintegrates, 7 astronauts dead
One year after the space shuttle Columbia broke up over Texas, NASA remembered the seven fallen astronauts aboard and reasserted the need for accuracy, safety and communication as the space program moved forward. NASA chief Sean O'Keefe has admitted the agency "flat missed" the accident's cause -- foam that hit the shuttle's wing shortly after liftoff. A post-crash report called for significant cultural and "structural changes" at NASA.

NASA aims higher | Report faults NASA culture | PDF
Audio Slide Show: Space Shuttle Columbia
More stories: Shuttle tragedy


The Crew
• Gallery: Columbia crew
The Investigation
• Ex-NASA engineer: 'No safety program' at NASA

The Tragedy
• Audio: 911 calls

Space Shuttle Columbia
• Diagram: Shuttle Columbia
• Interactive: Shuttle prep course
• Interactive: Flight stages
• Timeline: Shuttle milestones
• Panoramas: Space vault
• Interactive: Shuttle Discovery
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