Keep your eyes open and your mouth shut!


In this World War II poster, an open-mouthed fish is about to be hooked by an enemy worm. In wartime, avoiding careless talk to keep the enemy from learning secrets was a popular theme for Government posters. Such posters warned people that small snippets of information might be useful to the enemy and compromise national security and soldiers’ safety.

National Archives, Records of the Office of Government Reports


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