The Greek wiretapping case of 2004-2005, also referred to as Greek Watergate, involved the illegal tapping of more than 100 mobile phones on the Vodafone Greece network belonging mostly to members of the Greek government and top-ranking civil servants. The taps began sometime near the beginning of August 2004 and were removed in March 2005 without discovering the identity of the perpetrators. The phones tapped included those of the Prime Minister Kostas Karamanlis and members of his family, the Mayor of Athens, Dora Bakoyannis, most phones of the top officers at the Ministry of Defense, the Ministry of Foreign Affairs, the Ministry for Public Order, members of the ruling party, ranking members of the opposition Panhellenic Socialist Movement party (PASOK), the Hellenic Navy General Staff, the previous Minister of Defense and one phone of a locally hired Greek American employee of the American Embassy. Phones of Athens-based Arab businessmen were also tapped. Foreign and Greek media have raised United States intelligence agencies as the main suspects. AFP reported that one Greek official stated on background that the likely initial penetration occurred during the run-up to the 2004 Athens Olympics, stating: "it is evident that the wiretaps were organized by foreign intelligence agencies, for security reasons related to the 2004 Olympic Games." The leader of the PASOK socialist opposition George Papandreou said that the Greek government itself had pointed towards the US as responsible for the wiretaps by giving up the zone of listening range, in which the US embassy was included. In 2015, after an investigation lasting 10 years, Greek investigators have found conclusive evidence linking the wiretapping to the US Embassy in Athens. As a result of the investigation, Greek authorities have issued an arrest warrant for a certain William George Basil, a NSA operative from a Greek immigrant background. Exploitation of Vodafone's network The Ericsson switches used by Vodafone Greece were compromised and unauthorized software was installed that made use of legitimate tapping modules, known as "lawful interception", while bypassing the normal monitoring and logging that would take place when a legal tap is set up. This software was eventually found to be installed on four of Vodafone's Ericsson AXE telephone exchanges. In modern mobile telecommunication networks, legal wiretaps, known as lawful interceptions, are performed at the switch. Ericsson AXE telephone exchanges support lawful intercepts via the remote-control equipment subsystem (RES), which carries out the tap, and the