What can we learn from the biggest IT outage in history? A glitch at the major cybersecurity firm CrowdStrike brought banks, hospitals, airports, and thousands of businesses to a standstill. It was a reminder that our digital world is reliant on a few big companies to keep it running. So how vulnerable are they to accidents or attacks that could shut down wide sections of society? Lucy Hockings speaks to the BBC's Cyber Correspondent Joe Tidy. The Global Story brings you trusted insights from BBC journalists worldwide. We want your ideas, stories and experiences to help us understand and tell #TheGlobalStory. Email us at theglobalstory@bbc.com You can also message us or leave a voice note via WhatsApp on +44 330 123 9480. TGS is part of the BBC News Podcasts family. The team that makes The Global Story also makes several other podcasts, such as Americast and Ukrainecast, which cover US news and the war in Ukraine. If you enjoy The Global Story, you may well like some of our other pods, too. To find them, simply search on your favourite podcast app. This episode was made by Peter Goffin and Alix Pickles. The technical producers were Jack Graysmark and Mike Regaard. The assistant editor is Sergi Forcada Freixas and the senior news editor is Richard Fenton-Smith.