 CrowdStrike emphasizes neither a cyber attack nor a security incident is to blame. For now, Chris says, more than 1,500 flights are delayed, almost 900 canceled at U.S. airports. All of those flights that were supposed to leave the West Coast, those red eyes that should be landing about now in New York, they never took off. American and United say they have both restarted operations. It's unclear how long outages will last.