EditorialChris Krebs, former director of the Cybersecurity and Infrastructure Security Agency in the United States Department of Homeland Security, arrives to testify before a Senate Homeland Security and Governmental Affairs Committee hearing to discuss election security and the 2020 election process, in Washington on Wednesday, Dec. 16, 2020. (Anna Moneymaker/The New York Times)
EditorialChristopher Krebs, whom President Donald Trump fired this month as the director of CISA, the cybersecurity agency responsible for defending critical systems, in Washington, May 14, 2019. (Amr Alfiky/The New York Times)
EditorialChris Krebs, head of the Cybersecurity and Infrastructure Security Agency, appears before the Senate Judiciary Committee in Washington on May 14, 2019. (Amr Alfiky/The New York Times)
EditorialChris Krebs, head of the Cybersecurity and Infrastructure Security Agency, appears before the Senate Judiciary Committee in Washington on May 14, 2019. (Amr Alfiky/The New York Times)
EditorialChristopher Krebs, director of the Department of Homeland Security's Cybersecurity and Infrastructure Security Agency testifies before a Senate Judiciary Committee in Washington on May 14, 2019. (Amr Alfiky/The New York Times)