Marissa Mayer, chief executive officer of Yahoo! Inc., pauses during a panel session on day four of the World Economic Forum (WEF) in Davos, Switzerland, on Saturday, Jan. 25, 2014. World leaders, influential executives, bankers and policy makers attend the 44th annual meeting of the World Economic Forum in Davos, the five day event runs from Jan. 22-25. Photographer: Jason Alden/Bloomberg via Getty Images
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