"After all, the United States is the only country in the world that used nuclear, atomic weapons, moreover against a non-nuclear state - against Japan, against Hiroshima and Nagasaki, at the end of World War II. There was no absolute military sense in this. This was a direct extermination of the civilian population."
January 1, 1970
https://en.wikiquote.org/wiki/Atomic_bombings_of_Hiroshima_and_Nagasaki