https://m.youtube.com/watch?v=4eF60mnsAGU
https://youtu.be/Y8CvWDt9n3g
https://youtu.be/HGxBERhVaFQ
1916- the Centre Street Bridge, a historic bridge in Calgary, Canada, opens.
https://m.youtube.com/watch?v=UfP49h5IK1w
https://youtu.be/sclERzmbMh0
https://youtu.be/veg8CcB-xnI
https://youtu.be/UikB3kuZjo8
1954- World’s first fully automated railroad freight yard
https://youtu.be/bn2G6Dh67N0