By some estimates, taking out just nine critical electrical substations could plunge the whole nation into darkness. Threats to the electrical grid aren’t just from cybersecurity, but also from a lack of physical security. The Federal Energy Regulatory Commission asked the Battelle Memorial Institute to look into security of the bulk electricity system. Jason Black is the research leader at Battelle. He joined Tom Temin and Emily Kopp on the Federal Drive to talk about his findings.