Check this out. Not exactly what you’re talking about. It still super cool. m.youtube.com/watch?v=QfHy...

I want to say is was in mid 90's, he's passed so I can't call him to confirm, but my brother had a team of 8 guys that pulled fiber optics through the entire Pentagon. It took them right around 4 years to do the whole building.

So very cool... Thanks for sharing

You are most certainly welcome!