Any nukes proved too dirty to be feasible, which is why we never used them in this manner. There were a lot of good ideas that sounded good in the 60's, but the

Any nukes proved too dirty to be feasible, which is why we never used them in this manner. There were a lot of good ideas that sounded good in the 60's, but they had no real idea how much of a pain contamination, cleanup and thousands of years of storage of that material would be. Then they finally did and these ideas went away.