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 green lights are the server status LEDs reflecting from the front of the servers. Eight major technology companies, including Google, Facebook and Twitter, have joined forces to call for tighter controls on government surveillance, issuing an open letter Monday, Dec. 9, 2013 to President Bar
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Connie Zhou
