Why was Berlin a cause of tension?

Related questions

1. Does East Germany still exist?
2. What caused the Battle of Berlin?
3. Why do you think Berlin was divided into four zones?
4. What happened to the city of Berlin after ww2?
5. Is Berlin safe?
6. Is Berlin water hard or soft?
7. Why was Berlin blockaded?
8. Is tap water safe to drink in Dusseldorf?
9. Is the Berlin Welcome Card worth it?
10. What do you eat in Germany?

Tags

1. #airlift
2. #serious
3. #become
4. #became
5. #blockade
6. #germany
7. #force
8. #scene
9. #tension
10. #conflicts
11. #countries
12. #surrender
13. #western
14. #introduction
15. #cause
16. #wanted
17. #stalin
18. #berlin