What should be swept for secondary devices in incidents involving bombs and weapons of mass destruction?

In incidents involving bombs and weapons of mass destruction, it is crucial to sweep staging areas for secondary devices. Staging areas are locations where emergency responders gather before entering the hazard zone. These areas can be vulnerable to hidden explosive devices that could target responders or disrupt rescue efforts. Conducting thorough sweeps in these locations helps ensure the safety of the personnel preparing to respond to the incident.

Considering the context of the other options, responders themselves may be at risk, but it is more about protecting them once they are actively engaged in the response. Evacuation routes also require attention, but the immediate concern in terms of conducting sweeps typically focuses on areas where emergency activities are coordinated. Media zones, while they may need to be monitored for safety, are not primary focus areas for the identification of secondary devices in the same manner that staging areas are. Thus, thorough searches for possible threats in staging areas are vital to maintain a secure environment for responding teams.