In what circumstances would you use them, Chaz? Genuinely, your opinion, not what may or may not be likely."Not being able to imagine any circumstances where using our bombs would happen" is a very good thing. But you're right - they cannot be uninvented, and therefore it's important to me that we have a stake in the game. It sends a far bigger message than the payload itself, it says "We're taking national security as seriously as is possible". Whereas scrapping it all sends an equally clear message out - whether or not someone is a threat that can be countered with a nuclear response.
I could see myself using battlefield tactical weapons if my army was being wiped out, but not against a power that could wipe my country out. The country destroying weapons I can't find a situation where it would make sense, apart from revenge. You wouldn't use them against a non nuclear power unless you wanted to be an eternal international pariah, makes no sense to use them against terrorists unless you want to make more terrorists.
The balance of terror is what has worked. Trouble is that depended on relatively sane people being in charge. Now we have North Korea, Pakistan, China, Israel if it feels itself under existential threat, India which may go dodgy at some stage. The risk is actually much higher than for most of the Cold War.
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