Related Clues:

• Supersecretive intelligence org.
• DOD branch
• Secretive U.S. org.
• Org. implicated in a wiretapping scandal
• Intel org.
• Cryptic org.
• Top-secret org.
• Code-crackers' org.
• Intel inits.
• Electronic surveillance gp.
• U.S. codebreakers
• Fed. hush-hush gp.
• Covert org.
• Code-cracking gp.
• Govt. cryptanalysis org.