But talking about sea skimming nuclear tipped missiles and Russian bombers dropping nukes, even though today's bombers are used to deliver low yield nuclear cruise missiles shows you don't know what your talking about.
China, Russia and the United States are very unlikely to ever use nuclear weapons. That's the whole idea of having a nuclear arsenal, the threat of nuclear annihilation. It's been the nuclear arsenal that has prevented another major world war. Instead we have small proxy wars.
Israel is very likely use nukes for it's survival.
South Africa got rid of their nukes when they saw that the communist / socialist terrorist were going to gain control of their country.
The big threat is North Korea, Pakistan and soon Iran and their nukes and they seem not to be to worried being incinerated by our nukes if they were to use their nukes. That's the problem.