Amendment of the Constitution, probable cause that a crime has been or is beingcommitted is required to obtain a search warrant. However, under FISA, surveillance isauthorized upon finding probable cause that the target of the surveillance is of a foreignpower or acting on behalf of a foreign power. Although, “if the target is a "U.S. person,"there must be probable cause to believe that the U.S. person's activities may involveespionage or other similar conduct in violation of the criminal statutes of the UnitedStates. Nor may a U.S. person be determined to be an agent of a foreign power” solelyupon the basis of activities protected by the first amendment to the Constitution of theUnited States."5The FISA Amendment Act of 2008, which provides FISA with thepowers required to combat modern day issues, is often challenged as a violation ofother Constitutional rights and has even been compared to the East German Stasi.6FISA covers many aspects of surveillance, but the major provisions are____________________________________________4 "The Foreign Intelligence Surveillance Act of 1978," The Foreign Intelligence Surveillance Act of 1978, accessed August 28, 2016,.5 Ibid.6 Christian Caryl, "Secret Police State," Foreign Policy Secret Police State Comments, June 14, 2013, accessed August 28, 2016,.