Warren Buffett, chairman of Berkshire Hathaway Inc., talks with his daughter Susie Buffett at the Berkshire Hathaway annual shareholders meeting in Omaha, Nebraska, U.S., on Saturday, May 5, 2012. Berkshire Hathaway’s first-quarter profit doubled as insurance units and derivative bets posted better results, the company said yesterday as it prepares for Chairman Warren Buffett’s annual meeting. Photographer: Daniel Acker/Bloomberg via Getty Images