On this day in 1945, the American forces exploded a nuclear weapon over Hiroshima in Japan. This is the most destructive single event in human history if measured in terms of lives lost. The second most destructive was at Nagasaki.
It may not still be true, but some years ago I was told that in a knowledge survey, 80% of Americans asked "Which is the only country to have exploded a nuclear weapon over a foreign city?" answered that it must have been the damn Russkies.
In Wellington, white paper roses were on sale. They carried the text "FOR A NUCLEAR--FREE WORLD NOW".