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Doomed Challenger astronauts' horror final act in their last seconds alive

The Space Shuttle Challenger broke apart just 73 seconds after launch on January 28, 1986, killing all seven crew members ...
Space.com

40 years after the space shuttle Challenger disaster, spaceflight remains far from routine

Challenger exploded 73 seconds after liftoff while carrying seven people, including "Teacher in Space" participant Christa McAuliffe. Nobody survived the launch on Jan. 28, 1986 from NASA's Kennedy ...