https://www.npr.org/2021/04/06/983872116/after-a-major-hack-u-s-looks-to-fix-a-cyber-blind-spot Agencies in the U.S. government along with numerous other american companies were hacked by the russian foreign intelligence agency. This went undetected for a year or so until a major cybersecurity company detected a breach and reported it to the government along with other companies.
