This 2005 post from the NSA’s internal newsletter SIDToday features an interview with the deputy chief of the Middle East and North Africa product line. In light of a personnel shortage, he believes that new communications technology presents an advantage to the NSA, as the agency can spy on more intimate, firsthand communications from targets: see the Intercept article NSA Used Porn to “Break Down Detainees” in Iraq — and Other Revelations From 297 Snowden Documents, 1 March 2018.
This page from GCHQ’s internal GCWiki, dated 24 April 2012 describes procedures for searching through financial data retained by the agency, and cites examples of some of its sources: see the Intercept article Airport Police Demanded An Activist’s Passwords. He Refused. Now He Faces Prison In The UK, 23 September 2017.
In this extract from a 22 November 2011 article in the NSA’s internal SIDToday newsletter the agency’s director of Signals Intelligence, Teresa Shea, talks about the NSA’s role in the raid on bin Laden’s Abbottabad compound in very general terms: see the Intercept article What the Snowden Files Say About the Osama Bin Laden Raid, 18 May 2015.
This 42-page report from 10 March 2011 provides an overview of GCHQ’s information operations unit and the behavioural science theories that underpin its activities: see the Intercept article Controversial GCHQ Unit is Deeply Engaged in Law Enforcement, 22 June 2015.
This 6 August 2006 post from the internal NSA newsletter SIDToday describes advances in the agency’s text-to-speech capability: see the Intercept article The Computers are Listening: How the NSA Converts Spoken Words Into Searchable Text, 5 May 2015.
This 13 September 2010 presentation from the NSA’s OTP VPN Exploitation Team explains the work of the division: see the Der Spiegel story Prying Eyes: Inside the NSA’s War on Internet Security, 28 December 2014.