https://www.theguardian.com/world/2013/jun/20/fisa-court-nsa-without-warrant
Thu 20 Jun 2013
The top secret rules that allow NSA to use US data without a warrant
The broad scope of the court orders, and the nature of the procedures set out in the documents, appear to clash with assurances from President Obama and senior intelligence officials that the NSA could not access Americans' call or email information without warrants.
The documents also show that discretion as to who is actually targeted under the NSA's foreign surveillance powers lies directly with its own analysts, without recourse to courts or superiors – though a percentage of targeting decisions are reviewed by internal audit teams on a regular basis.
Since the Guardian first revealed the extent of the NSA's collection of US communications, there have been repeated calls for the legal basis of the programs to be released. On Thursday, two US congressmen introduced a bill compelling the Obama administration to declassify the secret legal justifications for NSA surveillance.
One such warrant seen by the Guardian shows that they do not contain detailed legal rulings or explanation. Instead, the one-paragraph order, signed by a Fisa court judge in 2010, declares that the procedures submitted by the attorney general on behalf of the NSA are consistent with US law and the fourth amendment.
Those procedures state that the "NSA determines whether a person is a non-United States person reasonably believed to be outside the United States in light of the totality of the circumstances based on the information available with respect to that person, including information concerning the communications facility or facilities used by that person".
It includes information that the NSA analyst uses to make this determination – including IP addresses, statements made by the potential target, and other information in the NSA databases, which can include public information and data collected by other agencies.
Where the NSA has no specific information on a person's location, analysts are free to presume they are overseas, the document continues.