The Electronic Frontier Foundation (EFF) filed a class-action lawsuit against AT&T on January 31, 2006, accusing the telecom giant of violating the law and the privacy of its customers by collaborating with the National Security Agency (NSA) in its massive, illegal program to wiretap and data-mine Americans' communications.

This is the reply memorandum of the united states in support of the state secrets privilege and the motion to dismiss or for summary judgment by the unites states and the official capacity defendants.