Section 702 of the Foreign Intelligence Surveillance Act (FISA) allows the United States government to obtain access to the communications (e.g. emails) of non-U.S. citizens without a warrant. The rationale behind the law is its potential for use in gathering intelligence on potential terrorists and potential terrorist activity. The law has become controversial because intelligence on U.S. citizens has incidentally occurred as well, as emails and phone calls from U.S. citizens have been contained in intelligence-storing databases. As the law expires at the end of 2017, Congress is considering changing the ways intelligence is collected pursuant to the collection procedures stipulated under the law.