I remember reading about some anonymous engineer(s) who worked on the shuttle, and how they'd tried to warn the powers-that-be. The NPR article provides the details to a story I was already pretty sure I'd guessed. Obviously something went very wrong, and it seemed basically impossible that nobody had any idea. Therefore someone did know, and of course they'd tried to warn them. Boisjoly didn't just try to warn them; he did, and NASA basically said "Nah, rescheduling would be a hassle. Let's do this anyway." Fucking bean counters.