Ukraine war puts US cities, states on cyber alert

President Joe Biden last week urged U.S. companies to be on high alert because of “evolving intelligence” that Russia is exploring options for potential cyberattacks against critical infrastructure targets. Even before Biden’s warning, state and local governments were busy shoring up their cybersecurity in response to the Russian invasion of Ukraine and the elevated threat of cyberattacks targeting the United States. Nearly two weeks before Russian troops poured over the border, the U.S. Cybersecurity and Infrastructure Security Agency issued a “Shields Up” warning about the growing threat. It...