A global IT outage caused by a defect in CrowdStrike's software has severely disrupted services worldwide, including the NHS and air travel. NHS patients face delays as GPs struggle to clear a backlog caused by the loss of the EMIS patient record system, while holidaymakers endure extended waits and cancellations. Airlines like Wizz Air and TUI are working to restore normal operations but warn that it will take time, offering rebooking options and refunds. The UK Civil Aviation Authority has reminded airlines of their obligations to assist affected travelers. CrowdStrike has deployed a fix and apologized for the disruption.