I guess you should know the code word for the successful Dambusters mission.
It was the name of Guy Gibson's dog who was run over and killed on the day of the raid.
It's the main reason that the remake wasn't made a couple of years ago.
They got as far as repainting a Lancaster and shooting all the preliminary footage before someone noticed that they couldn't make the film these days with that code word.
You'll have to look it up as it is no longer acceptable.

Cameras and mobile phones are now more powerful than baton rounds and truncheons.