<Li> David M. Brown </Li> <Tr> <Th> Inquiries </Th> <Td> Columbia Accident Investigation Board </Td> </Tr> <P> On February 1, 2003, the Space Shuttle Columbia disintegrated upon reentering Earth's atmosphere, killing all seven crew members . </P> <P> The disaster was the second fatal accident in the Space Shuttle program after Space Shuttle Challenger, which broke apart and killed the seven - member crew 73 seconds after liftoff in 1986 . </P>

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