In this Jan. 29, 2014, photo, Director of National Intelligence James Clapper listens as he testifies on Capitol Hill in Washington, before the Senate Intelligence Committee hearing on current and projected national security threats against the U.S. Clapper, said this week that the loss of state secrets as a result of leaks by former National Security Agency analyst Edward Snowden was the worst in American history. (AP Photo/Pablo Martinez Monsivais)