 The glitch appears to be linked to the CrowdStrike cybersecurity system. NPR's Brian Mann says American, Delta, and United Airlines are among the major carriers reporting delays. The outage linked to CrowdStrike security software appears to be affecting Microsoft, computer platforms around the world, affecting banking services and communications, including communications used by major airlines. The FAA's ground stop for American Airlines, Delta, and United are all linked to the disruption.