Southwest Airlines’ new planes fly with barrier to protect the cockpit when the door is opened mid-flight CTV NewsSouthwest Airlines flies first plane with secondary cockpit barrier USA TodaySouthwest installs fold-away cockpit barriers on new planes Yahoo News CanadaSouthwest Reveals First Plane with New Backup Barrier to Keep Passengers from Storming Cockpit People.comSouthwest Airlines begins using FAA-mandated cockpit barriers on new Boeing jetliners Fox Business