Berkshire CEO Warren Buffett & Microsoft Founder Bill Gates

Berkshire CEO Warren Buffett & Microsoft Founder Bill Gates

Daniel Acker/Bloomberg

Berkshire Hathaway Inc. Chairman and Chief Executive Officer Warren Buffett, right, stands next to Microsoft Corp. co-founder Bill Gates, as they participate in a newspaper toss prior to the start of the Berkshire shareholders meeting in Omaha, Nebraska, on May 4, 2013.