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Subject
- Cold War2
- Diplomatic relations2
- Foreign relations2
- History2
- Cold War (1945-1989)1
- Electronic surveillance1
- Espionage, British1
- Intelligence service1
- Korean War, 1950-19531
- Military intelligence1
- National security1
- Secret service1
- United States. National Security Agency1
- World War, 1914-19181
- World War, 1939-19451