American Airlines has resumed flights after grounding all flights in the country for technical reasons amid the start of a busy Christmas travel season. The halt lasted approximately 1 1/2 hours. “We’re currently experiencing a technical issue with all American Airlines flights. Your safety is our utmost priority, once this is rectified, we’ll have you safely on your way to your destination,” the company said in an X post at around 6:30 a.m. EST on Dec. 24. It was a reply to a post by a Twitter user who asked, “@AmericanAir on our flight to Miami and st croix from St. Louis. Sitting on the plane. System wide outage? What is going on?”…