This article from the NSA internal newsletter SIDToday discusses the progress of the agency’s voice recognition efforts, particularly in Spanish and the languages spoken in Afghanistan: see the Intercept article Finding Your Voice, 19 January 2018.
This NSA classification guide from 2008 shows that aspects of the agency’s activities during the Cuban Missile Crisis were still regarded as top secret, many decades later: see the Intercept article NSA Concealed Records on JFK Assassination for Decades, 25 October 2017.
This classification guide from 2000 shows that aspects of NSA investigations related to the Kennedy assassination were still classed as top secret, decades later: see the Intercept article NSA Concealed Records on JFK Assassination for Decades, 25 October 2017.
This 6 September 2011 post from the NSA’s internal SIDToday newsletter describes progress in the agency’s speech-to-text capability over the course of the year: see the Intercept article The Computers are Listening: How the NSA Converts Spoken Words Into Searchable Text, 5 May 2015.
These three short extracts from the 2013 Intelligence Community Budget Justification (“the Black Budget”) shows that Israel was seen as a counter-intelligence target: see the Intercept article Netanyahu’s Spying Denials Contradicted by Secret NSA Documents, 25 March 2015.
This NSA presentation from 2011 gives an overview of anonymising technologies, including Tor: see the Der Spiegel story Prying Eyes: Inside the NSA’s War on Internet Security, 28 December 2014.
In this short extract from a 2009 letter, Assistant Secretary of State Thomas Shannon thanks NSA Director Keith Alexander for the “deep insight into the plans and intentions” of other participants in the Fifth Summit of the Americas that the agency had provided: see the book No Place To Hide, 13 May 2014.
Selected slides, some with speaking notes, drawn from a 2010 NSA presention, describe the aims of the agency’s operations against Chinese company Huawei: see the New York Times article N.S.A. Breached Chinese Servers Seen as Security Threat, 22 March 2014.