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Related Clues:
- Langley letters
- Org. in Robert Ludlum novels
- "The Bourne Supremacy" org
- Hush-hush govt. org
- Espionage gp
- Covert org
- Operation Mongoose org
- Code breakers' org
- OSS supplanter
- Leon Panetta's org
- Govt. group for mathematicians
- Top-secret U.S. org
- Espionage letters
- MI6 : Britain :: ___ : U.S
- Letters for friends with benefits