NASA Columbia disaster: The investigation into one of history's worst space tragedies - and its lasting legacy

The Columbia space shuttle disaster resulted in the deaths of seven astronauts and changed the way NASA prepared and carried out such missions. Twenty years on, the agency's administrator at the time and a member of its investigation board reflect on the lasting legacy of the tragedy.
Read more: https://news.sky.com/story/nasa-columbia-disaster-the-investigation-into-one-of-historys-worst-space-tragedies-and-its-lasting-legacy-12796499?source=Snapzu