The outgoing head of U.S. Cyber Command and the National Security Agency today said the Defense Department needs to better manage defense contractors and risks they pose if their data is compromised by “malicious state actors” like Russia or China. Adm. Mike Rogers said during a Senate Armed Services Committee hearing that Russia and China have only become more aggressive when it comes to stealing and, in some cases, legally purchasing sensitive data from cleared U.S. defense contractors. “We find...