over 60 years, i will remind you of its essence: at the end of the fifties they had a professor, herman kahnup with the concept of the nuclear threshold. what does this mean? this is a period of time, hypothetical, that passes between the beginning of the war and the first use of nuclear weapons. kahn said that it can be of two types: either this threshold is low, the war begins immediately as a nuclear weapon. or he says the threshold is high: first we fight for a while with conventional weapons, then we send a signal with tactical nuclear weapons, if. first, as he says, we need to hit the ocean or the south pole to show the enemy: either peace or use nuclear weapons. if that doesn't work, then, he says, we use tactical nuclear weapons, and if it comes to strategic nuclear weapons, then kahn said: we will not hit cities, but destroy airfields and missile launchers of the enemy. us defense secretary robert said it differently then. mcnama. he said, don't hit the enemy in the face, it's better to smash his kuak, and then dictate his peace. first, we'll destroy his missiles before they launch,