In Part 3 of this three-part series, SPY Historian Dr. Vince Houghton sat down with Pulitzer Prize-winning journalist Greg Miller, who covers intelligence and national security for the Washington Post. Houghton and Miller 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 2 was with Ali Watkins of the Huffington Post.