When Edward Snowden decided in 2013 that the time had come to reveal the deepest secrets of the National Security Agency, one of the first journalists he approached was Barton Gellman of The Washington Post. In a conversation with Philip Taubman, Gellman will recount his dealings with Snowden and describe how he and his editors weighed how to handle the Snowden materials. Few questions are more difficult for American journalists than determining how far a free press can venture in disclosing national security secrets without imperiling the nation’s security.