Today On Deadline is looking into the CrowdStrike outage that brought what’s been dubbed the biggest IT outage in history. Workers at hospitals, banks, airlines, 911 services, broadcast news stations, and more were shut down last month when the backbone programs they rely on went dark -- and it couldn’t be fixed by just unplugging it and plugging it back in. What exactly does it do and how could it cause such a wide-reaching problem? Listen to find out. 'On Deadline' is hosted and produced by Lauren Barry. It's also produced by Joe Hiti, Christy Strawser. Sound design by Joe Hiti.