What is the first indicator to look for when assessing a vehicle for potential IED threats?

The presence of visible hazardous materials is a critical first indicator when assessing a vehicle for potential IED threats because such materials can directly signify an immediate risk. If hazardous materials are visible, they may indicate that the vehicle is carrying explosives or components associated with an improvised explosive device. This observation prompts an immediate concern for safety and warrants closer investigation of the vehicle.

Recognizing hazardous materials allows security personnel to assess the potential for an explosive threat effectively and use appropriate risk mitigation measures. The visibility of these materials presents a clear connection to the characteristic evidence of an IED, making them among the first elements to be evaluated in the threat assessment process surrounding vehicles.

While other factors, such as the behavior of the driver or the presence of unusual passengers, can also raise suspicions, and the absence of license plates can indicate illegitimacy, the direct association of hazardous materials with potential IED activity makes this indicator particularly noteworthy.