The recent hacker attack on Ukraine's power grid has made evident the inherent risk to which so much of our critical infrastructure is vulnerable. What is critical infrastructure? Wired explains, it's "any system of high importance to the safety and operation of the country." That includes the basics water plants, power-generation facilities, and oil refineries. But it also encompasses commercial, healthcare, and critical manufacturing facilities, transportation systems, and emergency response services. While many of what's deemed critical infrastructure is owned by private companies, it's protected in one way or another, based on whether or not the industries are regulated, by the government from physical and digital attacks.

Read more about protection for critical infrastructure at Wired.

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