FILE - In this Saturday, May 1, 2010, file photo, Berkshire Hathaway Chairman and CEO Warren Buffett surveys a model railroad prior to participating in the annual shareholders meeting,

 

              FILE - In this Saturday, May 1, 2010, file photo, Berkshire Hathaway Chairman and CEO Warren Buffett surveys a model railroad prior to participating in the annual shareholders meeting,
FILE - In this Saturday, May 1, 2010, file photo, Berkshire Hathaway Chairman and CEO Warren Buffett surveys a model railroad prior to participating in the annual shareholders meeting, in Omaha, Neb. Warren Buffett's company announced Wednesday, Dec. 26, 2012, that it has sold two short-line railroads it recently discovered it owned to satisfy regulators who might have reviewed Berkshire Hathaway's 2010 acquisition of the Burlington Northern Santa Fe railroad. (AP Photo/Nati Harnik, File)