This hearing by the Homeland Security and Government Affairs Committee examines the extent to which the electric grid may be vulnerable to the threats of solar weather or a high-altitude electromagnetic pulse. Protecting the electric grid is a monumental challenge, and the threats facing it are many and varied. The grid's physical infrastructure is necessarily spread throughout the nation and often cannot be protected from severe weather, sabotage or vandalism. Likewise, utilities themselves are encountering an enormous task in protecting their computer networks and fighting off cyberattacks....