David Sanger is a national security correspondent and a senior writer. In a 36-year reporting career for The New York Times, he has been on three teams that have won Pulitzer Prizes, most recently in 2017 for international reporting. His newest book, The Perfect Weapon: War, Sabotage and Fear in the Cyber Age, examines the emergence of cyberconflict as the primary way large and small states are competing and undercutting each other, changing the nature of global power. He is also the author of two Times bestsellers on foreign policy and national security: “The Inheritance: The World Obama Confronts and the Challenges to American Power,” published in 2009, and “Confront and Conceal: Obama’s Secret Wars and Surprising Use of American Power,” published in 2012. For The Times, Mr. Sanger has served as Tokyo bureau chief, Washington economic correspondent, White House correspondent during the Clinton and Bush administrations, and chief Washington correspondent. A 1982 graduate of Harvard College, Mr. Sanger was the first senior fellow in The Press and National Security at the Belfer Center for Science and International Affairs at Harvard. With Graham T. Allison Jr., he co-teaches Central Challenges in American National Security, Strategy and the Press at the Kennedy School of Government.