Not that I know of. I do remember a story in the Washington Post two years ago about extensive underground blasting under the Naval Observatory in Washington DC. This is where the Vice President's residence is (remember "Get out of Cheney's House!"?). I understood they where making some terrorist proof bunker.
Anyway, it would be a chance either way.
My screen name is from a book title about folks in a small Florida town surviving a full scale nuclear war and what they did to survive, even flourish after a time. I've always liked these kind of stories. However, if there was a extinction level event heading our way in only two weeks (especially 3 of them), we'd know about it by now.
Indeed.
I read such things as well. Jack London wrote a story (in the 20's? Set in the 20's? I could be way off) about such a situation, and my copy of "Earth Abides", which I was required to read in high school several centuries ago, I still have.
I'd think that the Naval Observatory (designed for 'Naval' gazing? LOL!) would be a poor choice for such a shelter. With so much of the Earth's surface covered with oceans, it'd likely be inundated. Even if the shelter had the characteristics of a submarine, there'd still probably be tons and tons of debris on top of it when the water receded. Way too close to the water.
Agree with your point about us knowing by now.
"Z for Zacharia" by Robert C. O'Brien, is often recommended for middle school kids...I read it before my children, and still am not sure I should have let them read this...but I sure enjoyed it! Spooky, dark, about life after the blast.