This training module by Jonathan T. Dworken examines the ability to understand the most likely threats face in an area, and provide insight into how to reduce the threats. It articulates the link between threats and vulnerability, and list factors affecting vulnerability. Every NGO in an area faces the same threats—the possibility that someone will harm NGO personnel, or steal or damage NGO property, through purposeful, often-violent action. But not all NGOs are equally vulnerable to those threats. Vulnerability differs among NGOs because vulnerability is based upon several factors introduced in this module.