Standard Oil founder John D. Rockefeller has long been considered the wealthiest man in America's history, but Elon Musk is now wealthier — and his fortune continues to grow.
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Judges have been trying to sell this $34.5 million Gilded Age mansion for six years. Designer Oleg Cassini's widow, right, and her sister, both in their 80s, keep fighting to reclaim it.