People don't realize that one of thinnest known spots of the Earth's crust is in Yellowstone. Pretty much everywhere else the crust is several factors of miles if not order of magnitude of miles deep. However in Yellowstone it is less than a quarter mile thick. Interesting apples; I wonder what the effect of a nuke detonated in the ground in Yellowstone would do.
Expose the magma to air and what would the overall effect be for the US?
Here will be the big question if it does blow. When did George W know about it and why did he not prevent it.