A Software Defect Measured in Milliseconds Grounded More Than 2,000 Flights

A report into a major flight disruption traces the failure to a software defect lasting milliseconds. The consequence was more than 2,000 cancelled flights and hundreds of thousands of passengers affected.

That ratio is the interesting part: the fault itself was brief, the outage was not. Systems built to fail fast and restart can still cascade if the restart is shared.