Jamil Jaffer, Founder and Law Professor of the George Mason University National Security Institute, discusses the conflict between free speech, free press, and other civil liberties guarantees and national security in the cases of the publication of the Pentagon Papers and the Edward Snowden leaks
"Civil Liberties" is a broad umbrella term referring to individual freedoms and guarantees that are largely protected from arbitrary infringement by the government. Limits on civil liberties generally require a compelling government interest and a respect of individuals' due process guarantees - for instance, the government can limit speech that presents a clear and present danger, or can conduct a limited search without a warrant pursuant to lawful arrest. The rights guaranteed by the Bill of Rights are largely classified as civil liberties. Many landmark Supreme Court cases deal with the efforts of our government to effectively balance civil liberties guarantees with police powers (the government's ability to act to secure societal health, safety, and welfare).