The Facebook "like" symbol is illuminated on a sign outside the company's headquarters in Menlo Park, Calif., Friday, June 7, 2013. A leaked document has laid bare the monumental scope of the government's surveillance of Americans' phone records — hundreds of millions of calls — in the first hard evidence of a massive data collection program aimed at combating terrorism under powers granted by Congress after the 9/11 attacks. The companies include Microsoft, Yahoo, Google, Facebook, PalTalk, AOL, Skype, YouTube and Apple. (AP Photo/Marcio Jose Sanchez)

Associated Press
The Facebook "like" symbol is illuminated on a sign outside the company's headquarters in Menlo Park, Calif., Friday, June 7, 2013. A leaked document has laid bare the monumental scope of the government's surveillance of Americans' phone records — hundreds of millions of calls — in the first hard evidence of a massive data collection program aimed at combating terrorism under powers granted by Congress after the 9/11 attacks. The companies include Microsoft, Yahoo, Google, Facebook, PalTalk, AOL, Skype, YouTube and Apple.  (AP Photo/Marcio Jose Sanchez)
The Facebook "like" symbol is illuminated on a sign outside the company's headquarters in Menlo Park, Calif., Friday, June 7, 2013. A leaked document has laid bare the monumental scope of the government's surveillance of Americans' phone records — hundreds of millions of calls — in the first hard evidence of a massive data collection program aimed at combating terrorism under powers granted by Congress after the 9/11 attacks. The companies include Microsoft, Yahoo, Google, Facebook, PalTalk, AOL, Skype, YouTube and Apple. (AP Photo/Marcio Jose Sanchez)
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