A United Airlines flight, UA2100, en route from Newark Liberty International Airport (EWR) to Chicago O'Hare International Airport (ORD), recently declared an in-flight emergency. The flight crew activated the 7700 transponder code, a universal signal that indicates a state of distress to Air Traffic Control (ATC) and ensures the flight receives immediate and priority attention. The specific cause for the emergency squawk has not been publicly detailed. Such declarations are standard procedure for a variety of situations that could potentially endanger the aircraft, its passengers, and crew, ranging from significant mechanical issues to urgent medical emergencies on board. The event has captured attention as the aviation community awaits further information on the circumstances and outcome of the flight.