Pilot attacks co-pilot with knife mid-flight; plane dives before recovery

A passenger video from a Dubai-to-Tel Aviv flight shows the aftermath of a cockpit struggle in which the pilot attacked the co-pilot with a knife, causing the aircraft to dive before being stabilized. The incident is unverified beyond the video and passenger account; the airline and authorities have not commented. This is a rare in-flight security breach that raises questions about cockpit access and crew vetting.