Related Clues:

• KGB whereabouts
• Erstwhile bloc letters
• Old NATO concern
• Old union mem.
• Beatles song ''Back in the ___''
• Sputnik launcher
• Superpower until 1991
• Pre-1991 world power
• SALT I signer
• Estonia, once: Abbr.
• Lithuania, once: Abbr
• HUAC concern
• Where Gorbachev ruled
• Brezhnev's empire
• 1984 summer Olympics no-show