Further Divisions and Churchill's Iron Curtain Speech

Across

• 1. What month in 1946 was Churchill's iron curtain speech? (5)
• 4. Stalin thought the USA would use the atomic bomb to prevent the ________ of communism (6)
• 5. Where was the speech presented? (6)
• 6. What would a soviet atomic bomb cause a threat to? (5, 5)