Investigative journalist and author Barton Gellman speaks with The Washington Post national security reporter Ellen Nakashima about Mr. Gellman’s bestseller, “Dark Mirror: Edward Snowden and the American Surveillance State.” Barton Gellman is a Pulitzer Prize and Emmy Award-winning journalist. Since 2013 he has been a senior fellow at The Century Foundation. During 21 years at The Washington Post he served tours as legal, military, diplomatic, and foreign correspondent. He has taught courses at Princeton on nonfiction writing, investigative reporting and national security secrecy. His bestselling “Angler: The Cheney Vice Presidency” won The Los Angeles Times’ Book Prize and was a New York Times Best Book of 2008.

Ellen Nakashima is a national security reporter for The Washington Post who writes about cyber, intelligence and related issues. In 2018, she and her colleagues won a Pulitzer Prize for coverage of Russia’s efforts to influence the outcome of the 2016 presidential election. In 2014, she was part of a team awarded a Pulitzer for reporting on the hidden scope of National Security Agency surveillance and its policy implications. Since joining The Washington Post in 1995, she also has served as a Southeast Asia correspondent and reported on the White House and Virginia politics.