The "operating manual for agents and saboteurs" -- which was produced by U.S. intelligence during World War II -- may have the answer in determining if your co-worker is a spy.
Video: FOX's Dianna Falzone has the details.
Read more: http://video.foxnews.com/v/2559964837001/how-to-tell-if-your-co-worker-is-a-spy/?intcmp=obnetwork
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