https://m.youtube.com/watch?v=vw7YxVJf6lU
1990- Demolition begins on the Berlin Wall at the Brandenburg Gate.
https://m.youtube.com/watch?v=UsqqQ7GIbuw
https://m.youtube.com/watch?v=XPgyXrjnJeg
1973- Groundbreaking at the Olympic Stadium in Montreal, Canada.
https://youtu.be/wBTIGGY-DHk
https://youtu.be/Vx0LwtLl4-M
1991- the Quicken Loans Arena, home of the Cleveland Cavaliers, opens after 2.5 years of construction.
https://youtu.be/7eY0gkkIPi4
https://youtu.be/UnzYq1d0Zjw