Conditions in remote areas overseas differ from those in the United States in the materials and methods of building construction, the climate, the utilities, the technical labor resources, and the indigenous security forces. Local street criminals pose the most common threat to Americans overseas, although executives and diplomats may become the targets of terrorists and professional criminals. In choosing an alarm system, security managers should initially focus on the climate, the electricity supply, and methods of minimizing false alarms. Choosing the control panel is also a crucial decision. Typical sensors used in residential security overseas include smoke detectors, duress or panic switches, magnetic contacts, passive infrared motion sensors, ultrasonic motion sensors, dual technology sensors, and vibration sensors. Security managers must also consider the choice of an installer and the need to educate users about the purpose, benefits, and limitations of the system as part of a comprehensive security plan.