However, Congress has passed laws creating related offenses that punish conduct that undermines the government or the national security, such as sedition in the 1798 Alien and Sedition Acts, or espionage and sedition in the Espionage Act of 1917, which do not require the testimony of two witnesses and have a much broader definition than Article Three treason. Some of these laws are still in effect. The well-known spies Julius and Ethel Rosenberg were charged with conspiracy to commit espionage, rather than treason.