Ongoing news reports in the international media have revealed operational details about the United States National Security Agency (NSA) and its international partners' global surveillance of foreign nationals and U.S. citizens. The reports mostly emanate from a cache of top secret documents leaked by ex-NSA contractor Edward Snowden, which he obtained whilst working for Booz Allen Hamilton, one of the largest contractors for defense and intelligence in the United States. In addition to a trove of U.S. federal documents, Snowden's cache reportedly contains thousands of Australian, British and Canadian intelligence files that he had accessed via the exclusive "Five Eyes" network. In June 2013, the first of Snowden's documents were published simultaneously by The Washington Post and The Guardian, attracting considerable public attention. The disclosure continued throughout 2013, and a small portion of the estimated full cache of documents was later published by other media outlets worldwide, most notably The New York Times (United States), the Canadian Broadcasting Corporation, the Australian Broadcasting Corporation, Der Spiegel (Germany), O Globo (Brazil), Le Monde (France), L'espresso (Italy), NRC Handelsblad (the Netherlands), Dagbladet (Norway), El País (Spain), and Sveriges Television (Sweden).