Why did people hijack planes?

People have hijacked planes for various reasons, including political motivations, terrorism, and ransom. In some cases, hijackers aimed to make a statement or draw attention to specific causes, while others sought financial gain or escape from law enforcement. Additionally, during certain periods, such as the late 20th century, hijacking became a tactic used by extremist groups to instill fear or achieve political objectives. Overall, the motivations behind plane hijacking often reflect broader social, political, or economic issues.