The Berlin Wall

The road where the museum is located was divided in two on August 13, 1961, and some 2,000 east German residents were expelled from their houses to allow the communist authorities to secure the new border.

[source] I was there. My dad was stationed in Ulm, Germany, at the time. We had to have bags packed and be ready to leave with 24 hours notice. That was 50 years ago. Things have sure changed in that time. Here I am writing something that is potentially read by people around the world. The dividing line between cultures is being defined by electronic walls and social media is spurring further change. The wall was up for 28 years. It's mind-boggling to think what the world will be like 28 years from now.