See Roger Boisjoly, an engineer at Morton Thiokol who tried to blow the whistle on design flaws in the Space Shuttle's solid rocket boosters before the Challeng

See Roger Boisjoly, an engineer at Morton Thiokol who tried to blow the whistle on design flaws in the Space Shuttle's solid rocket boosters before the Challenger disaster: https://en.wikipedia.org/wiki/Roger_Boisjoly https://en.wikipedia.org/wiki/Roger_Boisjoly > Boisjoly sent a memo describing the problem to his managers, but was apparently ignored.[8] Following several further memos, a task force was convened to investigate the matter, but after a month Boisjoly realized that the task force had no power, no resources, and no management support. In late 1985, Boisjoly advised his managers that if the problem was not fixed, there was a distinct chance that a shuttle mission would end in disaster. No action was taken. > After President Ronald Reagan ordered a presidential commission to review the disaster, Boisjoly was one of the witnesses called. He gave accounts of how and why he felt the O-rings had failed, and argued that the caucus called by Morton Thiokol managers, which resulted in a recommendation to launch, was an "unethical decision-making forum resulting from intense customer intimidation." > According to Boisjoly, Thiokol unassigned him from space work, and he was ostracized by his colleagues and managers.