Microsoft CEO <a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Steve+Ballmer&family=editorial&specificpeople=211258 ng-click='$event.stopPropagation()'>Steve Ballmer</a> speaks during a news conference about the purchase of Skype on May 10, 2011 in San Francisco, California. Microsoft has agreed to buy Skype for $8.5 billion.