I have vague recollections from the Cold War in the 1980s of the "Doomsday Clock," whose time supposedly reflected experts' predictions of the likelihood of nuclear annihilation. The idea of the clock is that its proximity to midnight denotes the world's nuclear climate. It was initially set at 7 minutes to midnight in 1947, and got as close as 2 minutes to midnight (1961, H-bomb tests by the U.S. and U.S.S.R.) and as far away as 17 minutes to midnight (1991, arms control agreement reached).
The keepers of the clock are apparently prepared to move it from its current position of 7 minutes to midnight, based on worsening conditions.
Here is what I'm wondering: if midnight marks "global catastrophe," does that mean that someone actually intends to move the clock to midnight in the event of thermonuclear war?