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Chilling discovery revealed astronauts' harrowing final moments before dying

The Space Shuttle Challenger exploded 73 seconds into flight on January 28, 1986, killing all seven crew members. Evidence ...

Chilling final words of Space Shuttle Challenger pilot before explosion killed 7

On January 28, 1986, Space Shuttle Challenger broke apart just 73 seconds after liftoff. Pilot Michael Smith's final words ...