Alaska Air Group has ordered a nationwide ground stop for all mainline flights due to a significant IT outage. This disruption follows concerns over a possible cyberattack after a "Scattered Spider" aviation warning. The FAA has been notified, and the airline is working to address the issue. The outage has affected thousands of travelers, causing widespread delays and cancellations. Authorities are investigating the situation as cybersecurity fears loom, emphasizing the importance of securing aviation infrastructure.