The picture I find most meaningful it the one showing the back side of an instrumentation bunker with the foreground occupied by welders on skids with the broom and shovel in the dirt. Those things are essentially the same today even down to their construction. The way they are used is the same. Yet the world we live in is completely different.

Those units appear to be US Army PE-95 generators, not welders.

https://www.purplewave.com/auction/210310/item/IG9246/US_Arm...