I remember a movie about a nuclear submarine. They received some message about some escalating situation (or something like that) then the outside transmissions stopped. They assumed the worst and were ready to fire their nuclear arsenal, but there was an uprising on board and they didn't fire. In the end it turns out it was the right call.
The movie was very good and I am pretty sure it is a well known movie, but I can't remember it's name. Does this sound familiar to anyone? Does someone know what the movie is?