Have you seen the speed of some of those missiles hitting Tel Aviv? Amazing. It is so easy to think that modern war is about bombs, drones, and missiles hitting valuable targets on the surface of the earth. But a big part of war is putting valuable targets underground -- 100 feet, or is it 200? I have trouble visualizing that. I always thought they used t unneling equipment, similar to building underground coal mines. After getting down 200 feet, they would have to create a big "cave" to hold a large building. Building that seems so slow and expensive since you need to remove all the loose stuff via tunnels, and then bring in the construction materials through those tunnels. I don't think they dig out a giant open-pit, and then build structures at the bottom of the hole in the usual way, and finally fill in the hole with "loose fill." It seems like loose fill would be less protective than a similar depth of solid rock, b ut solidity itself is no...
Occupation of Independence
Early retirement, mainstream-media-free, bicycling, classic books & history, RV camping, and dogs.