Space Shuttle Columbia disaster
Once high-quality video of the launch was ready, NASA reviewed it and concluded that everything was fine, and stopped engineers from using Department of Defense images from orbit to get a closer look. NASA management thought that even if something were wrong, it would be better for the crew not to know since rescue or repair would be nearly impossible. One flight director contacted Columbia about the concerns, but stressed "we have seen this same phenomenon on other flights and there is absolutely no concern for [re-]entry."