Nuke chicago?

[Chronos]

True, although I understand that Soviet doctrine with respect to Cheyenne and other known command centers was something like “explode the largest nuke we have at ground level as close to the site as possible. Once the smoke and dust clear enough for another warhead to survive, do it again. Repeat until reasonably certain said facility no longer exists, or until our own arsenal has been destroyed.”

Quoth Heinlein:

“Manny, I don’t think we should hit that mountain again.”
“Why not, Mike?”
“Because it isn’t there any more.”

(although technically that wasn’t nukes)