Airport security refers to the measures taken by airports and their authorities to ensure the safety, security and protection of passengers, employees, and facilities from potential threats such as crime or terrorism. This includes various procedures, protocols, equipment, and personnel designed to detect and prevent unauthorized access, weapons, explosives, and other dangerous objects from being brought onto an aircraft. Airport security measures may include screening of passengers and their luggage using X-ray machines, metal detectors or physical searches; the use of surveillance cameras, pat downs, and bag checks; as well as protocols for responding to potential threats such as hijackings or other emergencies. The goal is to ensure a safe and secure environment for everyone who uses air travel services.