Marissa Mayer, president and chief executive officer of Yahoo! Inc., delivers a keynote speech during a news conference at the 2014 Consumer Electronics Show (CES) in Las Vegas, Nevada, U.S., on Tuesday, Jan. 7, 2014. Mayer discussed the next stage of innovation, Yahoo's run of acquisitions and major structural changes as she works to turn the company around. Photographer: David Paul Morris/Bloomberg via Getty Images