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History undercover. Echelon, the most secret spy system
National Security Agency Director Gen. Mike Hayden and Secretary of State Colin Powell talk about a little-known surveillance program.
- "Echelon, the most secret spy system"@en
- "National Security Agency Director Gen. Mike Hayden and Secretary of State Colin Powell talk about a little-known surveillance program."@en
- "Documentary television programs"@en
- "History undercover. Echelon, the most secret spy system"@en