This 18 May 2010 article from the NSA internal newsletter SIDToday outlines how the agency is reacting to the growth of mobile phone services on board commercial aircraft: see the Intercept article American and British Spy Agencies Targeted In-flight Mobile Phone Use, 7 December 2016.
This 23 March 2011 article from the internal NSA newsletter SIDToday describes an analyst’s surprise at discovering that the agency was collecting internal communications from Venezuelan energy company Petróleos de Venezuela (PDVSA): see the Intercept article Overwhelmed NSA Surprised To Discover Its Own Surveillance “Goldmine” on Venezuela’s Oil Executives, 18 November 2015.
This undated dictionary produced by NSA Special Source Operations, provides glosses for several terms associated with the corporate partner FAIRVIEW, including the AT&T-specific term ‘SNRC’: see the New York Times article AT&T Helped U.S. Spy on Internet on a Vast Scale, 15 August 2015.
This NSA presentation from March 2009 shows how VOIP intercepts are handled in XKeyScore: see the Intercept article XKEYSCORE: NSA’s Google for the World’s Private Communications, 1 July 2015.
A Targeting Rationale document details how NSA analysts should justify their targeting decisions: see the Washington Post article NSA broke privacy rules thousands of times per year, audit finds, 15 August 2013.