40 years since NASA’s Challenger space shuttle disaster killed seven astronauts
It’s been 40 years since NASA’s Challenger disaster. The space shuttle exploded 73 seconds after take-off, killing all seven astronauts on board including teacher Christa McAuliffe.
The tragedy unfolded live on television. Investigators later blamed an O-ring that failed in the freezing launch conditions at Cape Canaveral, Florida.
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