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Imagine you are a spy deep undercover and you have to relay a message to another spy without saying a word. Short of telepathy, how could you possibly convey a secret message without anyone realizing it? Well, how about your shoe laces? Hello, and welcome to The Infographics Show. Today we're looking at the Shoelace Code and other secret techniques used by the CIA.

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Sources for this episode:
https://pastebin.com/2VJNUVaD