CrowdStrike: Is our tech too vulnerable?

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.

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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.