Project Echelon known as Project 415

Project 415 (ECHELON): How Governments 
Use Mass Surveillance for Intelligence :
https://greydynamics.com/understanding-project-415-echelon-how-governments-use-mass-surveillance-for-intelligence-gathering/

One of the Oldest Conspiracies Proven True: Project Echelon 2018 :
https://www.gaia.com/article/oldest-conspiracies-proven-true-project-echelon

Global Information Assurance Certification Paper.
The History, the Players and the Stakes Behind Echelon, Monitoring Technologies and Global Surveillance.
https://www.giac.org/paper/gsec/2277/history-players-stakes-echelon-monitoring-technologies-global-surveillance/103924

Echelon Conspiracies Movie :
https://moviesjoy.is/watch-movie/echelon-conspiracy-9726.5360188