Related Clues:

• Red letters?
• Stalin's domain
• One of the Allies of W.W. II
• It broke up in Dec. 1991
• Cold war foe
• Turning point
• Allies' foe
• Cold war abbr.
• Atlas abbr. before 1991
• Graph line
• Central line
• Former world power, for short
• Line of symmetry
• x or y, e.g.
• x, y or z