It's actually very interesting. I don't remember if it was from Command and Control, or somewhere else, that I once read a story along the lines of. When the m

It's actually very interesting. I don't remember if it was from Command and Control, or somewhere else, that I once read a story along the lines of. When the missile launch crews, routinely were tested. And something along the lines of a set of codes was used for a test launch. And a different set of codes was used for a real launch. On one of these tests, the real launch codes were used by mistake. But due to the crew asking for confirmation several times, the person eventually noticed their mistake and cancelled the order. But if I understand/remember correctly, strictly speaking these crews were given a valid launch command. While I didn't find my source for that particular example, I do believe it does happen where training and real have gotten mixed up. The most famous of which, is I think when the operator used a training tape in the early warning system, which caused the US to think they were under attack. https://www.damninteresting.com/the-apocalypses-that-might-have-been/ https://www.damninteresting.com/the-apocalypses-that-might-h...