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SEP 7 1964; John Rockefellers in Denver; John D. Rockefeller and his wife, Blanchette, are shown at Denver's Stapleton field Sunday during a change of planes on their trip back to their New York City home. Their daughter, Alida, was with them.; (Photo By Duane Howell/The Denver Post via Getty Images)

SEP 7 1964; John Rockefellers in Denver; John D. Rockefeller and his wife, Blanchette, are shown at Denver's Stapleton field Sunday during a change of planes on their trip back to their New York City home. Their daughter, Alida, was with them.;  (Photo By Duane Howell/The Denver Post via Getty Images)