 CrowdStrike, which basically does antivirus protection, issued an update which has had a bad effect on PCs and devices running Microsoft software, which of course is lots of them. CrowdStrike says the problem was not caused by a cyber attack or a security incident. The company says it has found a fix for the bug. For now, nearly 1,300 flights are delayed, 674 canceled at U.S. airports. Tabitha Bird is stranded at Hartsfield-Jackson in Atlanta.