In the mid 19th C Brunel built a ~100 mile long railway line in 5 years, the route was dug out by hand with picks shovels and wheelbarrows. It's a marvel of eng

In the mid 19th C Brunel built a ~100 mile long railway line in 5 years, the route was dug out by hand with picks shovels and wheelbarrows. It's a marvel of engineering with a route alignment that would allow trains to travel at well over 100mph. However, over a hundred people were killed just digging one of the tunnels on the route. When the Sears Tower was built there were probably still guys walking along the bare girders with no safety harnesses. So that's probably part of it.