Hijackers are individuals who unlawfully seize control of a vehicle, typically an aircraft, to achieve specific goals. This act often involves threatening passengers or crew members to force compliance. Hijacking can be motivated by various factors, including political, ideological, or financial reasons. The term is most commonly associated with aircraft hijacking, where perpetrators may demand ransom, seek asylum, or make political statements. Security measures at airports and on planes have increased significantly to prevent such incidents, including passenger screening and reinforced cockpit doors to protect against unauthorized access.