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He was behind me. And I was speaking to the crowd and I saw crowds booing and I turned around, I didn't quite see what it was. I learned about it right after I left the stage, the idea that there was a swastika, a symbol of everything that this country stands against -- we lost 400,000 people fighting that symbol, fighting Nazism. Six million Jews were killed, other people were killed. The most devastating war in the history of humanity.