Hack Against US Is 'Grave Threat', Cybersecurity Agency Says
AP Photo/Patrick Semansky, file Updated 12/17/20, 4:49 p.m. WASHINGTON — Federal authorities expressed increased alarm Thursday about a long-undetected intrusion into U.S. and other computer systems around the globe that officials suspect was carried out by Russian hackers. The nation's cybersecurity agency warned of a "grave" risk to government and private networks. The hack compromised federal agencies and "critical infrastructure" in a sophisticated attack that was hard to detect and will be difficult to undo, the Cybersecurity and Infrastructure Security Agency said in an unusual warn...