When your chief engineer says neoprene O Rings suck at low temperatures they have not been tested for DON’t LAUNCH !!!
I think it was Allan McDonald who is portrayed in the Netflix doc about Challenger. He’s given FAR too much credit for simply voting ‘no’.
He should have rightly committed seppuku after the disaster for not going public before the launch.
The blame lies entirely at the feet of those engineers who chose pensions over safety.