26K views · 984 reactions | The STS-1 mission launched NASA astronauts John W. Young and Robert Crippen into space for a 54.4 hour, 36 orbit test flight of Space Shuttle Columbia on April 12, 1981. | Space.com | Facebook

2M views · 502 reactions | On this day in 1986 the U.S. experienced the Space Shuttle Challenger tragedy. All seven astronauts on board were killed after the shuttle exploded a short time following lift-off. Do you remember where you were when it happened? | WHO 13 News | Facebook

The Challenger space shuttle tragedy shocked the entire world and reminded everyone of the gravity and intense dangers space exploration really is. Decades later, visiting space as a tourist is now closer than ever, but we must never forget those brave astronauts who risked everything to adventure into the great unknown. Today's epic new video revisits that tragic day and analyzes what caused the Challenger to experience a catastrophic failure. | The Infographics Show