60 Minutes rewind. >> As anyone who's sat through a Thanksgiving dinner can tell you, families can drive you nuts. And if you're bold or crazy enough to go into business together, beware.A recent study found only 15% of family businesses survive past the second generation. Meaning, if the whims of the marketplace don't catch up, familial rivalry or plain old-fashioned greed will. Which makes the Antinori family of Italy all the more remarkable.They've been in the same line of work for six centuries now. The ...