"Aside from the Cuban Missile Crisis, the September 26th incident was the closest the United States had ever been to a nuclear war — until now. The escalation between the United States and North Korea builds by the day. As each president continues to taunt the other, either by showing off military might or dishing out childish insults, the world gets closer to the possibility of nuclear war: one that could also involve the nuclear arsenals of China, even Russia."
https://fee.org/articles/the-nuclear-war-that-almost-was-and-the-man-who-prevented-it/
https://fee.org/articles/the-nuclear-war-that-almost-was-and-the-man-who-prevented-it/