Alaska Airlines has grounded all its flights across U.S. airports on Thursday evening because of an unspecified technology-related issue, the company said. The ground stop also applied to Alaska Airlines' subsidiary Horizon Air, a Federal Aviation Administration advisory showed, Reuters reported.In a post shared on X, the airline confirmed it was experiencing an "IT outage affecting operations." "A temporary ground stop is in place. We apologize for the inconvenience. If you're scheduled to fly tonight, ple ...