Elon Musk, as a yet-unproven entrepreneur in his mid-20s, declared himself the “reincarnation” of ancient Greek conqueror ...

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Elon Musk arrives for the president's address to a joint session of Congress. (Saul Loeb/Agence France-Presse/Getty Images) Elon Musk, wearing a suit and dark blue tie, just arrived to applause ...