While the nation's cities and counties are often closest to residents in providing citizen services, public safety and critical infrastructure such as public health and transport, many have limited staffing, expertise and cybersecurity budgets. Not only are the residents and cities and counties themselves potentially at risk, public safety, public health and critical infrastructure systems are part of larger connected state and national systems. For example, counties own 45% of the U.S. road miles, 40% of the bridges and operate of 30% of public airports and 1,550 health departments.