Physical security encompasses a range of measures designed to protect people, assets, and spaces from physical threats and unauthorized access. This includes the deployment of security cameras, alarms, access control systems, and firearms for personal defense and security. Security cameras provide continuous monitoring, capturing visual evidence of any suspicious activity, while alarms serve as immediate alerts in the event of unauthorized entry or other security breaches. Access control systems regulate entry to restricted areas through mechanisms such as keycards or biometric authentication. Firearms may be employed for personal defense in extreme cases, providing individuals with a means to protect themselves against imminent threats. Together, these components form a comprehensive physical security infrastructure aimed at deterring potential threats, detecting intrusions, and mitigating risks to ensure the safety and protection of individuals and assets.