From the 2009 Topical Symposium: Energy Security: A Global Challenge, September 29-30, 2009 in Washington, DC, this presentation overviews the joint exercise entitled "Secure Grid 2009" between the Department of Homeland Security (DHS), Department of Energy (DOE), and the Department of Defense (DOD). The joint exercise was hosted by the National Defense University. The presentation comments that "critical national security and homeland defense missions are at an unacceptably high risk of extended outage from the failure of the grid. [...] Dependence on a vulnerable commercial power grid may be a bigger risk to DOD than dependence on oil."
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/
2009 Topical Symposium: Engery Security, A Global Challenge