File photo of Chairman Bill Gates attending the Microsoft Shareholders meeting in Bellevue, Washington

 
File photo of Chairman Bill Gates attending the Microsoft Shareholders meeting in Bellevue, Washington
Microsoft chairman Bill Gates attends the Microsoft Shareholders meeting at Meydenbauer Center in Bellevue, Washington in this November 15, 2011, file photo. Gates is number two on the 2012 Forbes Billionaire list released March 7, 2012. REUTERS/Anthony Bolante/Files (UNITED STATES - Tags: BUSINESS SOCIETY)