David E. Sanger is a national security correspondent. In a 36-year reporting career for The Times, he has been on three teams that have won Pulitzer Prizes, most recently in 2017 for international reporting. His newest book is “The Perfect Weapon: War, Sabotage and Fear in the Cyber Age.” @SangerNYT • Facebook

Nicole Perlroth is a cybersecurity reporter. Her first book, “This Is How They Tell Me The World Ends,” about the global cyber arms race, will publish in February 2021. @nicoleperlroth