Counter-espionage
From Wikinfo
Espionage operations intended to identify enemy spies. Most countries have government agencies whose purpose includes counter-espionage. Examples include the Federal Bureau of Investigation in the United States, MI5 in the United Kingdom, and [[D�fense et S�curit� du Territoire]] in France.
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References
- Adapted from the Wikipedia article, "Counter-espionage" http://en.wikipedia.org/wiki/Counter-espionage, used under the GNU Free Documentation License
