“An electromagnetic (EM) attack (nuclear electromagnetic pulse [EMP] or non-nuclear EMP [e.g., high-power microwave, HPM]) has the potential to degrade or shut down portions of the electric power grid important to the DoD…. Restoring the commercial grid from the still functioning regions may not be possible or could take weeks or months.” Defense Threat Reduction Agency (DTRA) Press Release, June 24, 2016
