We can debate endlessly the wisdom of bombing Hiroshima, but does anybody have a defence for bombing Nagasaki? Since this is the quotation thread, I'll quote Dave Barry:

It was Truman who made the difficult decision to drop the first atomic bomb on the Japanese city of Hiroshima, the rationale being that only such a devastating, horrendous display of destructive power would convince Japan that it had to surrender. Truman also made the decision to drop the second atomic bomb on Nagasaki, the rationale being, hey, we had another bomb.

I'm seriously curious. (Reasonably rational arguments, of course.)