Two top secret revelations on government surveillance programs on Thursday have roiled some congressional lawmakers, but Americans whose phone records are being compiled by the National Security Agency are mostly left in the dark about who is gathering the information on them and how. A leaked classified document detailed a program under which a division of Verizon was ordered to hand over records to the NSA. This was followed up with news of a second program, codenamed PRISM, that reportedly gives U.S. intelligence agencies access to data maintained by some of the country's top Internet companies. While civil libertarians and privacy-conscious American balk at the privacy infringement, there are still many unanswered questions about what records are kept and how they're used to foil terrorist attack against the U.S. and its citizens. Who is listening to the calls? Who is reading the emails? What gives the government the authority to do it? Click through to get answers.
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