There have only been 5 instances resulting in 19 fatalities. None were when exiting the atmosphere. 2 were the flawed Space Shuttle on return. Only one other wa

There have only been 5 instances resulting in 19 fatalities. None were when exiting the atmosphere. 2 were the flawed Space Shuttle on return. Only one other was a flight system, on an experimental craft. https://en.m.wikipedia.org/wiki/List_of_spaceflight-related_accidents_and_incidents#:~:text=%2Fcosmonaut%22).-,During%20spaceflight,the%20entire%20crew%20was%20killed https://en.m.wikipedia.org/wiki/List_of_spaceflight-related_.... Today's rockets are far more reliable, and anything holding nuclear fuel should be the best of the best.