The Space Shuttle Challenger Disaster occurred on January 28th 1986. Nasa made some terrible decisions resulting in the death of all seven crew members that day as the space shuttle broke up after only 73 seconds into it's 10th flight over the Atlantic ocean. The cause was the Orings which expanded because the cold conditions that day. Nasa were frustrated and keen to launch but setbacks and technical problems delayed its schedule. It was a particularly cold morning with temperatures at -1c or 30f but the spacecraft was never certified to operate in temperatures that low. An O-ring is a sealer but the cold temperatures caused it to fail allowing hot burning gas to escape to the outside of the spaceship burning up against the exterior of the external fuel tank resulting in a explosion. None of the crew were found as no one could of survived the explosion or hitting the ground no safety meaures were implemented for this type of event. a 32 month hiatus ensured and a thorough investigation was carried out. Approximately 17% of Americans witnessed the event as Sharon Christa McAuliffe was the first school teacher into space, She was selected from over 11000 applicants fot the Nasa teacher in space project she died aged 37. Such a sad event and day will always be remembered as an iconic event.