Roger Boisjoly spoke up too, 33 years ago.
The first two of the three O-ring seals were failing regularly. They knew. I walked into my living room off a graveyard shift. Turned on a tv and watched the rerun of the explosion of Challenger. Schools all over Idaho had the tvs on too. They watched without knowing it was greed and stupidity of NASA managements fault. If You fail the first two levels of a three level risk blocker and keep going youre an idiot.