The vast, interconnected power grid is constantly relied upon, but rarely considered by most people, except when parts of it are down. This essential system plays a crucial role in the operation of an increasingly interdependent network of critical infrastructure assets, yet it faces formidable challenges. What are those vulnerabilities? And how can a national laboratory help to keep the grid resilient during periods of distress? In this lecture, Argonne Grid Program Leader Mark Petri discusses what Argonne does to help ensure the grid’s hardiness.