Over the course of a decade, a stream of credible scientific reports from various government agencies, congressionally-mandated commissions and federal research organizations have warned of the grave vulnerability of our nation's most important asset: the electric power grid. For millions of us, life in 21st Century America would be all but impossible without access to electricity. As this compendium of the government's own studies makes clear, the protracted unavailability of the power required for all of our critical infrastructures poses a truly existential threat to our country and its people-unless we take practical and relatively low-cost steps to prevent it.