Related Clues:

• Cryptologic grp.
• Ultra-secret org.
• Hush-hush grp.
• 'The Puzzle Palace' grp.
• Code-cracking org.
• Codebreakers' org.
• Decryption org.
• Gomer Pyle's org.
• Intelligence org.
• Fed. hush-hush group
• Govt. code crackers
• 'Enemy of the State' org.
• U.S. code and cipher grp.
• Largest U.S. employer of mathematicians
• Iwo Jima Memorial honorees: Abbr.