Answer:
USA PATRIOT Act, also called PATRIOT Act, in full Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001, U.S. legislation, passed by Congress in response to the September 11, 2001, terrorist attacks and signed into law by Pres. George W. Bush in October 2001, that significantly expanded the search and surveillance powers of federal law-enforcement and intelligence agencies.
