all images- Right click- open in New Window or Tab = super colossal!
... always a controversial beast; and a real 'widow-maker'. It seemed like a good idea but was never really needed.
... as I recall; one of the problems with "Project Plowshare" was that atomic earth-moving left a lot of radioactive earth. Dirt and rock is one of the things that holds onto radiation the longest. So you could do all sorts of gee-whiz keeno stuff with atomic munitions- but then you couldn't use them for anything!