High Quality Content by WIKIPEDIA articles! The history of the USA PATRIOT Act involved many parties who opposed and supported the legislation, which was proposed, enacted and signed into law a month and a half after the September 11 terrorist attacks of New York City in 2001. The USA PATRIOT Act, though approved by large majorities in the U.S. Senate and House of Representative, was controversial, and parts of the law were invalidated or modified by successful legal challenges over constitutional infringements to civil liberties. The Act had several sunset provisions, most reauthorized by the USA PATRIOT Improvement and Reauthorization Act of 2005 and the USA PATRIOT Act Additional Reauthorizing Amendments Act. Both reauthorizations incorporated amendments to the original USA PATRIOT Act, and other federal laws.