diplomatic communications of the Soviet Union and its Eastern Bloc allies. During the Vietnam War, Australian and New Zealand operators in the Asia-Pacific region worked directly to support the United States, while GCHQ operators stationed in the (then) British colony of Hong Kong were tasked with monitoring North Vietnamese air defence networks. During the Falklands War, the British received intelligence data from its FVEY allies such as Australia, as well as from third parties such as Norway and France. In the aftermath of the Gulf War, a technician of the ASIS was used by SIS to bug Kuwaiti government offices. In the 1950s, SIS and the CIA jointly orchestrated the overthrow of Iran's Prime Minister Mohammad Mosaddegh. In the 1960s, SIS and the CIA jointly orchestrated the assassination of the Congolese independence leader Patrice Lumumba. In the 1970s, the ASIS and the CIA jointly orchestrated the overthrow of Chile's President Salvador Allende. During the Tiananmen Square protests of 1989, SIS and the CIA took part in Operation Yellowbird to rescue dissidents from the Chinese regime. ECHELON network disclosures (1972–2000) By the end of the 20th century, the ECHELON surveillance network had evolved into a global system capable of sweeping up massive amounts of private and commercial communications, including telephone calls, fax, e-mail and other data traffic. This was done through the interception of communication bearers such as satellite transmission and public switched telephone networks. The Five Eyes has two types of information collection methods: the PRISM program and the Upstream collection system. The PRISM program gathers user information from technology firms such as Google, Apple and Microsoft, while the Upstream system gathers information directly from the communications of civilians via fiber cables and infrastructure as data flows past. The program's first disclosure to the public came in 1972 when a former NSA communications analyst reported to Ramparts magazine that the NSA had developed technology that "could crack all Soviet codes". In 1988, Duncan Campbell revealed in the New Statesman the existence of ECHELON, an extension of the UKUSA Agreement on global signals intelligence [Sigint]. The story, 'Somebody's listening,' detailed how the eavesdropping operations were not only being employed in the interests of 'national security,' but were regularly abused for corporate espionage in the service of US business interests. The piece passed largely unnoticed outside of journalism circles. In 1996, a detailed description of ECHELON was provided by New Zealand journalist