Edward Snowden, who is in Moscow, is seen on a giant screen during a live video conference for an interview as part of an Amnesty International event in Paris in December 2014. The House Permanent Select Committee on Intelligence published a summary report accusing Snowden of causing "tremendous damage to U.S. national security." Charles Platiau/AP hide caption

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Charles Platiau/AP

Demonstrators hold signs supporting Edward Snowden in New York's Union Square Park, on Monday. Snowden, who says he worked as a contractor at the National Security Agency and the CIA, gave classified documents to reporters, making public two sweeping U.S. surveillance programs and touching off a national debate on privacy versus security. Richard Drew/AP hide caption

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Richard Drew/AP