Berkshire Chairman Warren Buffett & Microsoft Founder Bill Gates

Berkshire Chairman Warren Buffett & Microsoft Founder Bill Gates

Daniel Acker/Bloomberg

Berkshire Hathaway Inc. Chairman Warren Buffett, right, and Microsoft Corp. Founder Bill Gates participate in a newspaper toss on the exhibition floor prior to the start of the Berkshire shareholders meeting in Omaha, Nebraska, on May 4, 2013.