This news story talks about the proximate cause of the failure and how the cover-up started. But it doesn't say how the cover-up propagated. 14 other people wer

This news story talks about the proximate cause of the failure and how the cover-up started. But it doesn't say how the cover-up propagated. 14 other people were fired. But we don't know why or whether that was the extent of either covering up or incompetently failing to to uncover either the problem or the cover-up.