Answer:
Every country has one, though we are not the same. Waving to our citizens, throughout the wind and rain. What is it?
The main difference between us and zombies
A blue man lives in the blue house. A red man lives in the red house. Who lives in the white house?
What is all over a house?
We are two brothers on opposite sides of the road, but we never see each other. Who are we?
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.