FILE - In this undated file photo made available by Google, hundreds of fans funnel hot air from the computer servers into a cooling unit to be recirculated at a Google data center in Mayes County, Okla. The U.S. government gathered data on online messages through a program that's intended to stop terrorism but that touches the communications of ordinary Americans. Internet companies already track users and then sell customized digital advertising. But they reacted indignantly after documents leaked by a former NSA contractor said the agency had backdoors at Google, Yahoo, Facebook, Apple and Microsoft. The companies said they provided data only as required by federal courts. They tried to mend any public fallout by pressing the Obama administration to curb electronic snooping and to let the companies disclose more information about government requests for their users' online activities. (AP Photo/Google, Connie Zhou, File) (File: YE Top 10 Business Business.JPEG-08f3d.jpg )