The National Research Council prepared the report, "Terrorism and the Electric Power System". The report was completed in 2007 but was classified by its sponsor, the Department of Homeland Security, until now. The Council lobbied DHS to allow for its release, and said key findings remain "highly relevant." It was publicly released November 14th. The report states: "Without urgent attention to security, the United States risks having large parts of the country blacked out "for weeks or months" at a cost of billions of dollars".