In this Dec. 8, 2005, file photo, a man walks out the Verizon's new corporate headquarters.The Obama administration on Thursday, June 6, 2013, defended the government's need to collect telephone records of American citizens, calling such information "a critical tool in protecting the nation from terrorist threats." Britain's Guardian newspaper reported that the NSA has been collecting the telephone records of millions of Verizon customers under a top secret court order. (AP Photo/Dima Gavrysh, File)

ACLU sues over NSA phone records program

Two prominent civil rights groups have filed a lawsuit against the National Security Agency over its program that reportedly collects the te…