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Being a good citizen meant keeping quiet about sensitive information -- troop movements, for example. Posters reminded people that spies could be lurking anywhere, monitoring conversations -- in public places, on telephone lines, or intercepting letters.
Pst! no date
The shadowy figure of a spy hovers over a couple dining in a restaurant.
Keep mum. The world has ears. 1941-1943
The Thirteenth Naval District of the U.S. Navy created this poster.
page created on 2.14.06
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