[BikerNYC]

Today it is acceptable only in retaliation for a nuclear strike.

I don't think so. I think it is viewed as acceptable if it is judged that it would help bring an end to whatever armed conflict we are in, nuclear or conventional.

[Dan Evans]

I think it is viewed as acceptable if it is judged that it would help bring an end to whatever armed conflict we are in, nuclear or conventional.

You may be right that some people feel that way but no one I know does and no president has. Otherwise why did Truman not use the bomb in Korea? Why have we not used it in the half dozen or so military conflicts since WWII?