On the morning of January 28th, 1986, seven brave NASA astronauts boarded the space shuttle Challenger, eager to carry out mission STS-51-L. But tragically, 73 seconds after the shuttle launched, an O-ring failure caused a catastrophic explosion that resulted in the deaths of all crewmembers on board. In today’s episode, we look at this devastating event that changed the history of space travel forever and the frustrating decisions that led to this tragedy.