The Challenger crew from left to right: Christa McAuliffe, Gregory B. Jarvis, Judith A. Resnik, Francis R. Scobee, Ronald E. McNair, Michael J. Smith and Ellison S. Onizuka.
The Challenger crew from left to right: Christa McAuliffe, Gregory B. Jarvis, Judith A. Resnik, Francis R. Scobee, Ronald E. McNair, Michael J. Smith and Ellison S. Onizuka. - 

Thirty years ago today the NASA space shuttle Challenger exploded just seconds after liftoff from the Kennedy Space Center in Florida on January 28, 1986. All seven crew members died in the disaster. It was one of the biggest tragedies in space exploration history.

Kai took to Twitter today and asked:

Here are some of your responses from Twitter, remembering the day of the accident:

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