Patriot Act 2002 Overview PDF, I will excerpt where it relates to FISA etc - Response to post on /v/qrv https://fas.org/irp/crs/RS21203.pdf The USA PATRIOT Act: A Sketch Charles Doyle Senior Specialist American Law Division Foreign Intelligence Investigations The Act eases some of the restrictions on foreign intelligence gathering within the United States, and affords the U.S. intellig ence community greater access to information unearthed during a criminal investigation, but it also establishes and expands safeguards against official abuse.   More specifically, it: 