Headline: US lacks proof that mass surveillance is effective – SnowdenLink: http://www.aysor.am/en/news/2014/12/13/US-lacks-proof-that-mass-surveillance-is-…Publication Date: Monday, December 15, 2014Primary Source: Aysor (Armenia)Type: new media postFormat: Web Only OutletNature of Mention: featuredScholar: CatoResearch Area: Foreign Policy and National SecuritySubjects: Edward Snowden's comments at the Cato Institute's Surveillance Conference