"Our Nation's critical infrastructure is essential to the economy, security, and sustainment of the American way of life. From the provision of essential goods and services--including energy, communications, food, and water--to the facilitation of essential commerce such as our transportation networks and critical manufacturing base, the owners and operators of America's critical infrastructure enable the daily activities of our country. Securing our physical and cyber infrastructure, helping to modernize it, and making it more resilient is a crucial part of our homeland security effort. We must continue to prioritize a strategic approach to accomplishing that mission. A major element of accomplishing that mission is the Department of Homeland Security's National Protection and Programs Directorate (NPPD) Office of Infrastructure Protection (IP), which leads the coordinated national effort to manage risks to our Nation's critical infrastructure. IP acts on behalf of the Secretary of Homeland Security, helping execute the national critical infrastructure protection responsibilities set forth in Homeland Security Presidential Directive 7 (HSPD-7). The vast majority of our Nation's critical infrastructure is owned and operated by the private sector, and IP's strategy is based largely on building partnerships, planning for preparedness, and sharing information and tools to ensure the availability, security, and resilience of the Nation's critical infrastructure."
U.S. Department of Homeland Security: http://www.dhs.gov/