Tim Cook, chief executive officer of Apple Inc., left, and the band U2 gesture during a product announcement at Flint Center in Cupertino, California, U.S., on Tuesday, Sept. 9, 2014. Apple Inc. unveiled redesigned iPhones with bigger screens, overhauling its top-selling product in an event that gives the clearest sign yet of the company’s product direction under Cook. Photographer: David Paul Morris/Bloomberg via Getty Images