[thackney]

How about the Hoover Dam. A classic example of America’s ingenuity. Remember it was built with sliders and mules.

There was quite a bit of real machinery used.

http://mashable.com/2015/09/11/hoover-dam-construction/#dhI6yrsnskqo

[Kozy]

It was reported that thousands of mules were used. Those pictures are photoshopped. Do a fact check!!!!
Ah, it got your attention.

You agree with they did use slide rules?

Happy New Year