High Quality Content by WIKIPEDIA articles! The United States' National Security Agency (NSA) maintains a database containing hundreds of billions of records of telephone calls made by U.S. citizens from the four largest telephone carriers in the United States: AT T, SBC, BellSouth (all three now called AT T), and Verizon.
High Quality Content by WIKIPEDIA articles! The United States' National Security Agency (NSA) maintains a database containing hundreds of billions of records of telephone calls made by U.S. citizens from the four largest telephone carriers in the United States: AT T, SBC, BellSouth (all three now called AT T), and Verizon.
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