If they were meant to survive nuclear apocalypse, then why did one small non-nuclear bomb bring them down? You'd think they should be better constructed or protected or something.
I see. I guess odds were pretty low that a nuclear bomb would lay waste to a rural town.
As an aside, I wonder why they used so many languages if the nuclear winter survivors would have been rural Georgians like the ones who built the monument. I don't imagine a Russian survivor would ever find themself in the American Deep South without functional airplanes and such.