I feel embarrassed to be unaware of [nuclear winter], one that I have not even heard mentioned before. On the contrary, I would have understood much earlier that the risks of a nuclear war were far more serious than I imagined. I assumed that the planet would be able to withstand the explosion of hundreds of nuclear bombs calculating that, in both the United States and the USSR, countless tests have been carried out over the years.
—Fidel Castro, August 23, 2010.
Pretty naive for a guy who was willing to park a bunch of Soviet nukes in his country fifty years ago.