A weapon of mass destruction (WMD) is a weapon that can kill and bring significant harm to a large numbers of humans and other life forms, and cause great damage to man-made structures (building and roads), natural structures (mountains, forests), or the biosphere.
According to the FBI, WMDs include:
- Any explosive or incendiary device, as defined in Title 18 USC, Section 921: bomb, grenade, rocket, missile, mine, or other device with a charge of more than four ounces;
- Any weapon designed or intended to cause death or serious bodily injury through the release, dissemination, or impact of toxic or poisonous chemicals or their precursors;
- Any weapon involving a disease organism; or
- Any weapon designed to release radiation or radioactivity at a level dangerous to human life.