The Challenger Incident
Being an astronaut is an exciting thing as you get to travel to space. However, the astronauts in this image had no reason to believe that anything would go wrong. The challenger plane had landed several times before this incident occurred.

However, this time things took a bitter twist. Within 73 seconds of taking off, an important element broke, resulting in a crash that left all seven astronauts dead. It was a terrifying moment to all the onlookers but more so to the families of the astronauts who were on board.