Apparently, there are still people who worry about nuclear holocaust and the extinction of mankind, including some prominent American politicians. Read Chuck Colson's article on Breakpoint.
I remember growing up during the height of the cold war, and not being too concerned about the Russians bombing the US with nukes. I figured if there was so much devastation that the human race is nearly wiped out, a lot more is going on than some crazy politicians pushing big red buttons. Read Revelation 9:15-19.
I mean, really, dying in a nuclear holocaust is not so bad if you trust in the sovereign Lord of the Universe. The problem is surviving one.