1) Why is there a graffiti section  called the "death strip" on the west side?

2) why were people killed trying to cross over to the west side of the wall?

3) how does the wall relate to the GDR's authoritarian rule?

4) why were only westerners allowed to visit east germany, but the east side could not come over to the west?

5) why was this made into a monument, since it symbolizes a negative period in germany's history?