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The Utah Data Center

The Utah Data Cente, one of the NSA's data gathering facilities, in a 2014 photo released on July 9, 2014. (Electronic Frontier Foundation)

U.S. spying controversy

U.S. authorities threatened to fine Yahoo $250,000 a day if it failed to comply with a secret surveillance program requiring it to hand over user data in the name of national security, court documents showed Thursday.

The documents, made public in a rare unsealing by a secretive court panel, "underscore how we had to fight every step of the way to challenge the US government's surveillance efforts," Yahoo general counsel Ron Bell said in a blog post that will again raise privacy concerns. (AFP)

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