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We don't know what would happen if a terrorist-supporting state whose leader loathes the United States more than Stalin, Mao, Tojo, and Hitler combined obtained nuclear arms. Khamenei would have defeated the United States - the West - in an epic struggle. Perhaps a sensible fear of the awesome power in his hands would take hold and Tehran would refrain from using or leveraging its new weapons. But it's doubtful the “shadow of God on earth would be so well behaved. He's a man with a mission. If the supreme leader gets nuclear weapons, it will be a miracle if he does does not stupidly lead his country into war.