Related Clues:
- Sputnik letters
- Letters from Sputnik
- One-time superpower
- U.S. ally in W.W. II
- Moscow was its cap.
- Khrushchev's country: Abbr.
- Letters associated with early space missions
- Evil Empire acronym
- RWR's 'evil empire'
- Former Security Council member
- Five-Year Plan implementer, for short
- WWII U.S. ally
- State dissolved in 1991
- Once-mighty initials
- Letters on 'Sputnik'