Mother Jones had a good article (print version) about the Connecticut librarians ["radical bookworms" in MJ's terms, oy!] who fought the USA PATRIOT Act. It’s a little overblown, in my opinion, but has a good sequence of events. Worth understanding that though the National Security Letter of USAPA was deemed unconstitutional, many other parts of the USA PATRIOT Act are still with us and will be into this next administration. More Daily Kos discussion on this topic yesterday.
National security letters are a little-known fbi tool originally used in foreign intelligence surveillance to obtain phone, financial, and electronic records without court approval. Rarely employed until 2001, they exploded in number after the Patriot Act drastically eased restrictions on their use, allowing nsls to be served by fbi agents on anyone—whether or not they were the subject of a criminal investigation. In 2000, 8,500 nsls were issued; by contrast, between 2003 and 2005 the fbi issued more than 143,000 nsls, only one of which led to a conviction in a terrorism case.