This module lays the foundation for understanding terrorism and targeted violence within broader security contexts. Before threats can be assessed or managed, they must first be clearly defined. Terms such as national security, homeland security, and organizational security are often used interchangeably, yet each carries distinct responsibilities, priorities, and implications for prevention and response. The module begins by defining terrorism and targeted violence, clarifying how these forms of violence differ, and where they overlap. Definitional clarity directly influences how threats are identified, how they are evaluated, and how institutions, agencies, organizations, and communities respond. You will also examine how terrorism and targeted violence affect governments, communities, and organizations. Whether the target is public infrastructure, a workplace, or a specific individual, the consequences can extend far beyond the immediate incident, disrupting operations, eroding public trust, and creating lasting harm.By the end of this module, you will understand the structure of the contemporary threat landscape and why precise definitions are essential for effective threat assessment, prevention, and strategic response.

In the previous module, we defined terrorism and targeted violence and examined their scope and impact. Now, we turn to the foundational concepts that allow practitioners to assess and manage these threats systematically. Effective threat assessment begins with a shared vocabulary. Terms such as threat, vulnerability, asset, target, and risk are frequently used in security discussions, but they are not interchangeable. These distinctions directly shape how analysts evaluate danger, prioritize resources, and design prevention strategies. In this module, we begin by defining the core concepts of threat, vulnerability, asset, target, and risk. We then introduce the basic methods used in assessment, examine how actor characteristics shape threat, and explore how practitioners assess both threats and vulnerabilities in practice. Finally, we bring these elements together to show how integrated assessment supports risk prioritization and decision-making. Although these terms may seem straightforward at first glance, their precise meaning influences how assessments are conducted and how decisions are made. By the end of this module, you will have a clear conceptual framework that serves as the foundation for applying threat and vulnerability assessment tools in real-world contexts.

In the previous module, we examined how practitioners assess threats, vulnerabilities, and risk using structured frameworks. We focused on identifying who may pose a threat, where vulnerabilities exist, and how those factors combine to shape risk. Although these approaches help us understand what matters, they do not fully answer a critical question - namely, when is a threat moving toward action? Behavioral threat assessment addresses this gap by helping us recognize when an individual may be moving toward violence and what can be done to intervene. This shift is especially important in the context of terrorism and targeted violence. These acts, by definition, are premeditated. They often follow observable patterns of thinking and behavior that develop over time. Through attention to these patterns, practitioners can identify warning signs, assess escalation, and intervene before violence occurs. In this module, we introduce behavioral threat assessment, drawing on approaches developed and refined by the U.S. Secret Service and others. Rather than relying on profiles or static characteristics, this approach emphasizes dynamic, observable behaviors and the pathways individuals follow from grievance to action. You will explore how the Secret Service model reshaped threat assessment by focusing on behavior rather than prediction, and how pathway-to-violence models help practitioners understand how attacks develop over time. You will also learn to recognize key warning behaviors and understand how these frameworks are applied across contexts, including law enforcement, national security, workplaces, and schools. By the end of this module, you will be able to identify behavioral indicators of threat, distinguish between different behavioral modes of violence, and understand how early recognition and intervention strategies can help reduce the likelihood of targeted violence.