What an underground nuclear explosion looks like

One this day, 53 years ago, the Lawrence Livermore National Laboratory detonated a thermonuclear device 194 meters below the Nevada desert. Why? Well, the government at the time thought blowing up a nuclear bomb underground sounded like a good idea if you want to excavate a mine. It’s a lot quicker than drilling with a lot machines. After all, mines are made using thousands of tonnes of dynamite. Why not take a shortcut and nuke the damn thing. The problem, of course is radiation. But how can you have people work in a mine if it’s contaminated with radiation, right? The logic escapes me as well.