American Surveillance: Intelligence, Privacy, and the Fourth Amendment

To defend its citizens from harm, must the government have unfettered access to all information? Or, must personal privacy be defended at all costs from the encroachment of a surveillance state? And, doesn't the Constitution already protect us from such intrusions? When the topic of discussion is intelligence-gathering, privacy, or Fourth Amendment protections against unreasonable search and seizure, the result is usually more heat than light.
Anthony Gregory challenges such simplifications...