Steve Ballmer, left, Chairman and CEO of Microsoft, and Stephen Elop, President and CEO of Nokia, introduce Nokia's newest smartphone, the Lumia 920, equipped with Microsoft's Windows Phone 8, Wednesday, Sept. 5, 2012 in New York. Nokia revealed its first smartphones to run the next version of Windows, a big step for a company that has bet its future on an alliance with Microsoft. (AP Photo/Mark Lennihan)
