While business aircraft operations have been relatively safe, small planes are vulnerable to various hostile intrusions, including sabotage, hijacking, bomb threats, kidnapping, and theft. Intrusions also can include unintentional, inadvertent damage to the aircraft. Reasonable plans and procedures should be developed that enable security personnel to respond to such incidents. Security surveys at a number of corporate sites revealed such security breaches as uncontrolled access to expensive equipment and aircraft, insufficient perimeter security, malfunctioning or easily removed locks and latches, improper baggage identification and handling and check-in controls, inadequate passenger lists, and inadequate protection for corporate executives. Security plans and procedures should be a joint effort of the corporate aviation department and the security department. Procedures should deal with remedying such deficiencies as cited above, as well as accidents and emergencies.