We have technology to address the problem in that Fail Safe movie: https://en.wikipedia.org/wiki/Permissive_action_link https://en.wikipedia.org/wiki/Permissive

We have technology to address the problem in that Fail Safe movie: https://en.wikipedia.org/wiki/Permissive_action_link https://en.wikipedia.org/wiki/Permissive_action_link And that's one reason manned bombers are a very important part of the nuclear triad, they can be launched "on warning" and sent the codes to arm their bombs and missiles later.