What It Is
Intentional attacks using weaponized or non-weaponized chemical, biological, radiological, and nuclear materials can cause great harm and pose significant threats. Weaponized materials can be delivered by using conventional bombs, improvised explosive materials, enhanced blast weapons, and even non-explosive dispersion devices (including canisters and envelops). Non-weaponized chemical materials are typically categorized as "hazardous materials" (HazMat).
CBRN releases sometimes require extended clean-up efforts and/or law enforcement investigations, and they may therefore result in residents being unable to be in their homes for long periods of time.