The city of Berlin played a significant role in Phase I and Phase II of the Cold War. Why was it such a big deal?
1) Because it was the physical dividing line between the East and West.
2) Because the western half of the city was a "capitalist island in a sea of communism."
3) Because it symbolized the end of WW2 and the beginning of the Cold War.
4) Because of all the above reasons.