text:  The world is recovering from a global IT outage that left planes grounded, surgeries canceled, and emergency services disconnected. It was caused by a faulty software update. NPR's Jen McLaughlin has more. Cybersecurity company CrowdStrike has tens of thousands of customers, and its software is deployed on millions of computers around the world. That software requires deep access to devices to keep track of all digital activity and flag anything suspicious.