American Society Of Civil Engineers
Firstly, The Berlin Wall was built as a symbol of the Cold War and to separate East and West Berlin. To prevent emigration from East Berlin into West Berlin or any other part of Germany.
The Fall of Berlin wall - It was torn down because East Berlin wanted yearned to be one free country with West Berlin. The destruction of the wall was celebrated all over the world.
Answer:
Primary sources are usually firsthand accounts of the certain incident, and can contail details that secondary sources may miss.
Explanation: