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NEW YORK - MARCH 14: David Rockefeller poses for photo in his office in the Rockefeller building on March 14, 2006 in New York City. David Rockefeller is last living grandson of John D. Rockefeller, the oil tycoon who founded the family's vast fortune. (Photo by Jean-Christian Bourcart/Getty Images)

NEW YORK - MARCH 14:  David Rockefeller poses for photo in his office in the Rockefeller building on March 14, 2006 in New York City. David Rockefeller is last living  grandson of John D. Rockefeller, the oil tycoon who founded the family's vast fortune.  (Photo by Jean-Christian Bourcart/Getty Images)