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as those from Space Shuttle Columbia, the Space Shuttle Challenger and Apollo 1

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nasa_kennedy_space_centre_199.jpg including astronauts from training and commercial airplane accidentsThumbnailsThe Astronaut Memorial honors the 24 fallen U.S. astronauts including astronauts from training and commercial airplane accidentsThumbnailsThe Astronaut Memorial honors the 24 fallen U.S. astronauts