A sign stands outside the National Security Administration (NSA) campus in Fort Meade, Md., Thursday, June 6, 2013. The Obama administration on Thursday
A sign stands outside the National Security Administration (NSA) campus in Fort Meade, Md., Thursday, June 6, 2013. The Obama administration on Thursday defended the National Security Agency's need to collect telephone records of U.S. citizens, calling such information "a critical tool in protecting the nation from terrorist threats." (Patrick Semansky)