"Development of the Cold War ": HTML5 Crossword

Across

3. Sent into space in 1957 (7)
5. US president at the end of the Korean War (10)
6. First man on the moon (4,9)
13. The new policy of the new Soviet leader in 1955 (8,11)
14. Scandinavian member of NATO (6)
15. Khrushchev invited him to Moscow (8,4)
16. Capital of Hungary (8)
17. Wanted reform in Hungary (4,4)
18. Made independent in 1955 (7)

Down

1. Guerilla rebels in Vietnam (8)
2. Who took over from Stalin? (6,10)
4. Hated leader of Hungary (6)
6. Created to boost the US space Programme (4)
7. Given in 1956 and leaked to the world (6,6)
8. Who 'landed' in 1969? (3,5)
9. Leader of the Vietminh (2,3,4)
10. US president at the start of the Korean War (6)
11. Sacked in Korea (7,9)
12. He wanted you to 'Duck and Cover' (4,3,6)