Spies the book

5. one-way voice link.
6. An economic system with the purpose of achieving a level of social equality.
9. The term used to refer to the Security Service.
11. A preemptive nuclear strike on enemy.
13. A spy who pretends to work for one country while secretly working for its opponent.
15. An expression used in the West during the Cold War.
16. The term used to refer to SIS.
17. Intercontinental ballistic missile.
18. The Central Intelligence Agency.
19. The House Un-American Activities Committee.
20. German Democratic Republic.

1. An extremely small camera.
2. An economic system in which companies are privately owned and run for the purpose of making a profit.
3. The act of spying.
4. A small enclosed space designed to protect occupants from nuclear fallout.
7. Secret Intelligence Service.
8. The North Atlantic Treaty Organization.
10. A paper that dissolves.
12. A permanent barrier separating East Berlin and West Berlin and Surrounding all of West Berlin.
14. Competition between the US and USSR to build more and stronger nuclear weapons.