A brief history of the Berlin wall.
http://www.history.com/topics/cold-war/berlin-airlift
After watching this video, scroll down to see photos of Berlin now & then.
http://www.dailymail.co.uk/news/article-2819861/A-tale-two-cities-Photo-combinations-Berlin-changed-Wall-built-looks-today-25th-anniversary-fall-approaches.html#v-3872541963001
http://www.history.com/topics/cold-war/berlin-airlift
After watching this video, scroll down to see photos of Berlin now & then.
http://www.dailymail.co.uk/news/article-2819861/A-tale-two-cities-Photo-combinations-Berlin-changed-Wall-built-looks-today-25th-anniversary-fall-approaches.html#v-3872541963001