People holds masks with pictures of former NSA contractor Edward Snowden during the testimonial of Glenn Greenwald, the American journalist who first published the documents leaked by Snowden, in ... more 
People holds masks with pictures of former NSA contractor Edward Snowden during the testimonial of Glenn Greenwald, the American journalist who first published the documents leaked by Snowden, in Brasilia in this file photo taken August 6, 2013. Snowden said the changes the American government and private companies have made about managing massive amounts of data helped vindicate his leaks of classified material. REUTERS/Ueslei Marcelino/Files (BRAZIL - Tags: POLITICS SCIENCE TECHNOLOGY) less 
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Reuters | Photo By UESLEI MARCELINO / REUTERS
Mon, Mar 10, 2014 3:58 PM EDT