A widespread technology outage caused by a malfunction in a routine software update from cybersecurity firm CrowdStrike disrupted airlines, banks, hospitals, and emergency services globally. Thousands of Microsoft users were knocked offline, stranding airport travelers, delaying hospital appointments, and interrupting live news broadcasts. Major airlines such as Delta, United, and American Airlines grounded all flights, and 911 phone lines in states like Alaska and Ohio were down. CrowdStrike confirmed it was not a cyberattack but a software glitch, and a fix has been sent to customers. Mac and Linux users were unaffected.