On January 28th, 1986 at 11:39am EST The Space Shuttle Challenger exploded 73 seconds after liftoff. A terrible disaster taking the lives of seven astronauts- Greg Jarvis, Christa McAuliffe who was the first teacher to go into space, Ronald McNair, Ellison Onizuka, Judith Resnik, Michael J. Smith and Dick Scobee.
The O-ring seal in its right solid rocket booster failed at liftoff.
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