The U.S. Department of Homeland Security has identified what is determined to be

The U.S. Department of Homeland Security has identified what is determined to be critical infrastructure assets that are designated as potentially being of terrorist interest. Althoughthe final responsibility and mission for protecting those assets and sectors of each remains with the DHS the initial accountability rests with local ownership and authorities.The DHS has formulated a National Infrastructure Protection Plan to explain and describe the national responsibility. A very significant majority of the infrastructure elements are under private or corporate ownership and maintenance and must share the bulk of responsibility for protection and security under their own mission plans for security.Assignment Guidelines