Privacy and civil liberties in the hands of the government post-September 11, 2001 : recommendations of the 9/11 Commission and the U.S. Department of Defense Technology and Privacy Advisory Committee : joint hearing before the Subcommittee on Commercial and Administrative Law, and the Subcommittee on the Constitution of the Committee on the Judiciary, House of Representatives, One Hundred Eighth Congress, second session, August 20, 2004.