In Part 2 of this three-part series, SPY Historian Dr. Vince Houghton sat down with Ali Watkins, who covers intelligence and national security for the Huffington Post. Houghton and Watkins discuss the difficulties in reporting on this most secret of topics, the dangers – and benefits – of using anonymous sources, and the ever-changing nature of intelligence and national security journalism. Part 1 of this series was with Mark Mazzetti of the New York Times, and Part 3 will be with Greg Miller of the Washington Post.