This 2005 article from the internal NSA newsletter SIDToday describes the conclusions of a meeting of the SIGINT Seniors group – the participants committed the 12 nations to deploy a tactical communications system in Afghanistan and build on the successful partnership during the Athens Olympics Games in advance of the 2006 Winter Olympics in Italy […]

This 12 August 2010 post from the NSA’s internal newsletter SIDToday describes the outcomes of the annual Sigint Seniors Europe (SSEURP) conference, which agreed in principle to increase information sharing: see the Intercept article The Powerful Global Spy Alliance You Never Knew Existed, 1 March 2018.

This NSA classification guide, dated 21 November 2011, covers signals intelligence material that as to be kept secret for more than the standard 60 years: see the Der Spiegel article The NSA in Germany: Snowden’s Documents Available for Download, 18 June 2014.

This undated internal NSA document illustrates the degrees of cooperation in the agency’s relationships with different foreign powers. “Tier A” and “Tier B” are elsewhere referred to as Second and Third Parties: see the book No Place To Hide, 13 May 2014.

This 24 February 2005 article from the internal NSA newsletter Foreign Affairs Digest describes third party cooperation and interoperability in High Frequency Direction-Finding (HFDF): see the Intercept article Japan Made Secret Deals With The NSA That Expanded Global Surveillance, 24 April 2017.

This short excerpt from an NSA document shows that nine European States – Belgium, Denmark, France, Germany, Italy, The Netherlands, Norway, Spain and Sweden – have a second-tier ‘third party’ relationship with the agency: see the SVT article NSA “asking for” specific exchanges from FRA – Secret treaty since 1954, 8 December 2013.

These July 2009 documents provide a full list of the fibre-optic cables GCHQ had access to at that point, including details of location, bandwidth and corporate partners: see the Süddeutsche Zeitung article Snowden-Leaks: How Vodafone-Subsidiary Cable & Wireless Aided GCHQ’s Spying Efforts, 25 November 2014. […]

This document lists the 193 governments, intragovernmental organisations and other entities which the NSA was granted the legal authority to intercept communications “about” for foreign intelligence purposes in August 2010: see the Washington Post article Court gave NSA broad leeway in surveillance, 30 June 2014.

The NSA released its first-ever "intelligence need" ”” a request for assistance in collecting signals intelligence from Second and Third Party partners ”” in monitoring a specific information target relating to the Iraqi election. An Italian partner responded with an extensive report.

The SIGINT Seniors conference includes signals intelligence leaders from Belgium, Canada, Denmark, France, Germany, Great Britain, Italy, Netherlands, Norway, Spain, Sweden, and the United States. At the 2005 conference, the participants committed the 12 nations to deploy a tactical communications system in Afghanistan and build on the successful partnership during the Athens Olympics Games in advance of the 2006 Winter Olympics in Italy and the FIFA World Cup in Germany.

This NSA information paper from April 2013 describes the state of the agency’s intelligence relationship with its New Zealand counterpart: see the New Zealand Herald article NZ’s spy reach stretches across globe, 11 March 2015.

This internal NSA briefing dated 17 January 2013 describes the current state of the US-German intelligence relationship and mentions that “The BND has been working to influence the German Government to relax interpretation of the privacy laws over the long term to provide greater opportunity for intelligence sharing”: see the Der Spiegel article New NSA […]

This slide, taken from the NSA’s annual review of its cooperation with foreign partners, shows an expansion in the agency’s international relationships: see the book No Place To Hide, 13 May 2014.

At a meeting of counterterrorism analysts from 12 participating nations, there was agreement on the exchange of telephony metadata and facilitating the exchange of call chaining diagrams.

This 15 December 2003 post from the internal NSA newsletter SIDToday discusses plans for the agency’s operations at the Athens Olympics the following year: see the Intercept article A Death in Athens: Did a Rogue NSA Operation Cause the Death of a Greek Telecom Employee?, 29 September 2015.

The U.S. closed a number of High Frequency Direction-Finding sensor sites in the 1990s. To ensure they're able to track signals in areas that had previously been covered by now-shuttered stations, the Signals Intelligence Directorate worked with Second and Third Party partners to share resources and establish a global direction-finding network.

SID had many openings for analytic support for the 2004 Summer Olympics in Greece, and the response was “overwhelming.” The article lists eight people selected out of 300 applicants.