A United Airlines flight faced a severe emergency scenario as a passenger allegedly assaulted a flight attendant and attempted to breach the cockpit. The incident prompted the crew to declare an emergency while the flight was approaching Newark Airport. Authorities report that the unruly passenger was detained upon landing, following a disturbance that led to chaos onboard. Audio recordings from the flight captured the alarming moments, highlighting the fear experienced by both the crew and passengers. The situation has raised concerns regarding security protocols as it violated FAA regulations. The passenger is currently under evaluation and may face legal consequences.